alts: Remove dependency on Apache commons lang

alts/BUILD.bazel

@@ -47,7 +47,6 @@ java_library(
         "@io_netty_netty_common//jar",
         "@io_netty_netty_handler//jar",
         "@io_netty_netty_transport//jar",
-        "@org_apache_commons_commons_lang3//jar",
     ],
 )
 

alts/build.gradle

@@ -18,7 +18,6 @@ dependencies {
             project(':grpc-grpclb'),
             project(':grpc-protobuf'),
             project(':grpc-stub'),
-            libraries.lang,
             libraries.protobuf,
             libraries.conscrypt
     def nettyDependency = implementation project(':grpc-netty')

alts/src/main/java/io/grpc/alts/CheckGcpEnvironment.java

@@ -24,9 +24,9 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.nio.file.Files;
 import java.nio.file.Paths;
+import java.util.Locale;
 import java.util.logging.Level;
 import java.util.logging.Logger;
-import org.apache.commons.lang3.SystemUtils;
 
 /** Class for checking if the system is running on Google Cloud Platform (GCP). */
 final class CheckGcpEnvironment {
@@ -65,11 +65,12 @@ final class CheckGcpEnvironment {
   }
   
   private static boolean isRunningOnGcp() {
+    String osName = System.getProperty("os.name").toLowerCase(Locale.ENGLISH);
     try {
-      if (SystemUtils.IS_OS_LINUX) {
+      if (osName.startsWith("linux")) {
         // Checks GCE residency on Linux platform.
         return checkProductNameOnLinux(Files.newBufferedReader(Paths.get(DMI_PRODUCT_NAME), UTF_8));
-      } else if (SystemUtils.IS_OS_WINDOWS) {
+      } else if (osName.startsWith("windows")) {
         // Checks GCE residency on Windows platform.
         Process p =
             new ProcessBuilder()

build.gradle

@@ -164,7 +164,6 @@ subprojects {
             protobuf: "com.google.protobuf:protobuf-java:${protobufVersion}",
             protobuf_lite: "com.google.protobuf:protobuf-javalite:${protobufVersion}",
             protobuf_util: "com.google.protobuf:protobuf-java-util:${protobufVersion}",
-            lang: "org.apache.commons:commons-lang3:3.11",
 
             netty: "io.netty:netty-codec-http2:[${nettyVersion}]",
             netty_epoll: "io.netty:netty-transport-native-epoll:${nettyVersion}:linux-x86_64",

repositories.bzl

@@ -39,7 +39,6 @@ IO_GRPC_GRPC_JAVA_ARTIFACTS = [
     "io.opencensus:opencensus-contrib-grpc-metrics:0.24.0",
     "io.perfmark:perfmark-api:0.23.0",
     "junit:junit:4.12",
-    "org.apache.commons:commons-lang3:3.11",
     "org.apache.tomcat:annotations-api:6.0.53",
     "org.codehaus.mojo:animal-sniffer-annotations:1.19",
 ]