grpc-js-core: remove unused variables

This commit removes unused variables reported by temporarily
enabling tslint's no-unused-variable rule. Unused function
parameters have not been removed.

packages/grpc-js-core/src/call-credentials-filter.ts

@@ -1,5 +1,3 @@
-import {promisify} from 'util';
-
 import {CallCredentials} from './call-credentials';
 import {Call} from './call-stream';
 import {Http2Channel} from './channel';

packages/grpc-js-core/src/call-credentials.ts

@@ -1,4 +1,4 @@
-import {map, reduce} from 'lodash';
+import {map} from 'lodash';
 
 import {Metadata} from './metadata';
 

packages/grpc-js-core/src/call-stream.ts

@@ -1,9 +1,8 @@
 import * as http2 from 'http2';
-import {Meta} from 'orchestrator';
 import {Duplex} from 'stream';
 
 import {CallCredentials} from './call-credentials';
-import {Channel, Http2Channel} from './channel';
+import {Http2Channel} from './channel';
 import {Status} from './constants';
 import {EmitterAugmentation1} from './events';
 import {Filter} from './filter';
@@ -67,12 +66,9 @@ enum ReadState {
   READING_MESSAGE
 }
 
-const emptyBuffer = Buffer.alloc(0);
-
 export class Http2CallStream extends Duplex implements Call {
   credentials: CallCredentials = CallCredentials.createEmpty();
   filterStack: Filter;
-  private statusEmitted = false;
   private http2Stream: http2.ClientHttp2Stream|null = null;
   private pendingRead = false;
   private pendingWrite: Buffer|null = null;

packages/grpc-js-core/src/call.ts

@@ -1,5 +1,4 @@
 import {EventEmitter} from 'events';
-import * as _ from 'lodash';
 import {Duplex, Readable, Writable} from 'stream';
 
 import {Call, StatusObject, WriteObject} from './call-stream';
@@ -87,8 +86,6 @@ function setUpReadableStream<ResponseType>(
   });
   call.on('status', (status: StatusObject) => {
     if (status.code !== Status.OK) {
-      const statusName = _.invert(Status)[status.code];
-      const message = `${status.code} ${statusName}: ${status.details}`;
       const error: ServiceError =
           Object.assign(new Error(status.details), status);
       stream.emit('error', error);

packages/grpc-js-core/src/channel-credentials.ts

@@ -1,4 +1,4 @@
-import {ConnectionOptions, createSecureContext, PeerCertificate, SecureContext, TLSSocket} from 'tls';
+import {ConnectionOptions, createSecureContext, PeerCertificate} from 'tls';
 
 import {CallCredentials} from './call-credentials';
 

packages/grpc-js-core/src/channel.ts

@@ -1,25 +1,22 @@
 import {EventEmitter} from 'events';
 import * as http2 from 'http2';
-import {checkServerIdentity, PeerCertificate, SecureContext} from 'tls';
+import {checkServerIdentity, PeerCertificate} from 'tls';
 import * as url from 'url';
 
-import {CallCredentials} from './call-credentials';
 import {CallCredentialsFilterFactory} from './call-credentials-filter';
-import {Call, CallStreamOptions, Deadline, Http2CallStream, PartialCallStreamOptions} from './call-stream';
+import {Call, CallStreamOptions, Deadline, Http2CallStream} from './call-stream';
 import {ChannelCredentials} from './channel-credentials';
 import {ChannelOptions, recognizedOptions} from './channel-options';
 import {CompressionFilterFactory} from './compression-filter';
 import {Status} from './constants';
 import {DeadlineFilterFactory} from './deadline-filter';
 import {FilterStackFactory} from './filter-stack';
-import {Metadata, MetadataObject} from './metadata';
+import {Metadata} from './metadata';
 import {MetadataStatusFilterFactory} from './metadata-status-filter';
 import {Http2SubChannel} from './subchannel';
 
 const {version: clientVersion} = require('../../package');
 
-const IDLE_TIMEOUT_MS = 300000;
-
 const MIN_CONNECT_TIMEOUT_MS = 20000;
 const INITIAL_BACKOFF_MS = 1000;
 const BACKOFF_MULTIPLIER = 1.6;
@@ -31,7 +28,6 @@ const {
   HTTP2_HEADER_CONTENT_TYPE,
   HTTP2_HEADER_METHOD,
   HTTP2_HEADER_PATH,
-  HTTP2_HEADER_SCHEME,
   HTTP2_HEADER_TE,
   HTTP2_HEADER_USER_AGENT
 } = http2.constants;

packages/grpc-js-core/src/client.ts

@@ -1,9 +1,6 @@
-import {once} from 'lodash';
-import {URL} from 'url';
-
 import {ClientDuplexStream, ClientDuplexStreamImpl, ClientReadableStream, ClientReadableStreamImpl, ClientUnaryCall, ClientUnaryCallImpl, ClientWritableStream, ClientWritableStreamImpl, ServiceError} from './call';
 import {CallCredentials} from './call-credentials';
-import {Call, Deadline, PartialCallStreamOptions, StatusObject, WriteObject} from './call-stream';
+import {Call, Deadline, StatusObject, WriteObject} from './call-stream';
 import {Channel, ConnectivityState, Http2Channel} from './channel';
 import {ChannelCredentials} from './channel-credentials';
 import {ChannelOptions} from './channel-options';

packages/grpc-js-core/src/compression-filter.ts

@@ -2,7 +2,6 @@ import * as zlib from 'zlib';
 
 import {Call, WriteFlags, WriteObject} from './call-stream';
 import {Channel} from './channel';
-import {Status} from './constants';
 import {BaseFilter, Filter, FilterFactory} from './filter';
 import {Metadata, MetadataValue} from './metadata';
 

packages/grpc-js-core/src/deadline-filter.ts

@@ -1,5 +1,5 @@
 import {Call} from './call-stream';
-import {Channel, ConnectivityState, Http2Channel} from './channel';
+import {ConnectivityState, Http2Channel} from './channel';
 import {Status} from './constants';
 import {BaseFilter, Filter, FilterFactory} from './filter';
 import {Metadata} from './metadata';

packages/grpc-js-core/src/index.ts

@@ -1,5 +1,3 @@
-
-import {IncomingHttpHeaders} from 'http';
 import * as semver from 'semver';
 
 import {CallCredentials} from './call-credentials';

packages/grpc-js-core/src/make-client.ts

@@ -1,10 +1,8 @@
 import * as _ from 'lodash';
 
-import {PartialCallStreamOptions} from './call-stream';
 import {ChannelCredentials} from './channel-credentials';
 import {ChannelOptions} from './channel-options';
-import {Client, UnaryCallback} from './client';
-import {Metadata} from './metadata';
+import {Client} from './client';
 
 export interface Serialize<T> { (value: T): Buffer; }
 
@@ -27,11 +25,6 @@ export interface ServiceDefinition {
 
 export interface PackageDefinition { [index: string]: ServiceDefinition; }
 
-function getDefaultValues<T>(metadata?: Metadata, options?: T):
-    {metadata: Metadata; options: Partial<T>;} {
-  return {metadata: metadata || new Metadata(), options: options || {}};
-}
-
 /**
  * Map with short names for each of the requester maker functions. Used in
  * makeClientConstructor

packages/grpc-js-core/src/subchannel.ts

@@ -2,9 +2,8 @@ import {EventEmitter} from 'events';
 import * as http2 from 'http2';
 import * as url from 'url';
 
-import {Call, Http2CallStream, PartialCallStreamOptions} from './call-stream';
+import {Call, Http2CallStream} from './call-stream';
 import {ChannelOptions} from './channel-options';
-import {EmitterAugmentation0, EmitterAugmentation1} from './events';
 import {Metadata} from './metadata';
 
 const {
@@ -12,7 +11,6 @@ const {
   HTTP2_HEADER_CONTENT_TYPE,
   HTTP2_HEADER_METHOD,
   HTTP2_HEADER_PATH,
-  HTTP2_HEADER_SCHEME,
   HTTP2_HEADER_TE,
   HTTP2_HEADER_USER_AGENT
 } = http2.constants;

packages/grpc-js-core/test/test-call-stream.ts

@@ -1,7 +1,6 @@
 import * as assert from 'assert';
-import {EventEmitter} from 'events';
 import * as http2 from 'http2';
-import {forOwn, range} from 'lodash';
+import {range} from 'lodash';
 import * as stream from 'stream';
 
 import {CallCredentials} from '../src/call-credentials';