core: remove unnecessary type params in ServerStreamTracer

core/src/main/java/io/grpc/ServerStreamTracer.java

@@ -28,7 +28,7 @@ public abstract class ServerStreamTracer extends StreamTracer {
    * Called before the interceptors and the call handlers and make changes to the Context object
    * if needed.
    */
-  public <ReqT, RespT> Context filterContext(Context context) {
+  public Context filterContext(Context context) {
     return context;
   }
 

core/src/main/java/io/grpc/internal/CensusTracingModule.java

@@ -309,7 +309,7 @@ final class CensusTracingModule {
     }
 
     @Override
-    public <ReqT, RespT> Context filterContext(Context context) {
+    public Context filterContext(Context context) {
       // Access directly the unsafe trace API to create the new Context. This is a safe usage
       // because gRPC always creates a new Context for each of the server calls and does not
       // inherit from the parent Context.

core/src/test/java/io/grpc/internal/ServerImplTest.java

@@ -132,7 +132,7 @@ public class ServerImplTest {
   private List<ServerStreamTracer.Factory> streamTracerFactories;
   private final TestServerStreamTracer streamTracer = new TestServerStreamTracer() {
       @Override
-      public <ReqT, RespT> Context filterContext(Context context) {
+      public Context filterContext(Context context) {
         Context newCtx = super.filterContext(context);
         return newCtx.withValue(SERVER_TRACER_ADDED_KEY, "context added by tracer");
       }

interop-testing/src/main/java/io/grpc/testing/integration/AbstractInteropTest.java

@@ -169,7 +169,7 @@ public abstract class AbstractInteropTest {
       private volatile Context contextCapture;
 
       @Override
-      public <ReqT, RespT> Context filterContext(Context context) {
+      public Context filterContext(Context context) {
         contextCapture = context;
         return super.filterContext(context);
       }