minor: remove the unnecessary final,static (#11098)

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

@@ -38,7 +38,7 @@ public final class AltsChannelBuilder extends ForwardingChannelBuilder2<AltsChan
       new AltsChannelCredentials.Builder();
 
   /** "Overrides" the static method in {@link ManagedChannelBuilder}. */
-  public static final AltsChannelBuilder forTarget(String target) {
+  public static AltsChannelBuilder forTarget(String target) {
     return new AltsChannelBuilder(target);
   }
 

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

@@ -35,7 +35,7 @@ public final class ComputeEngineChannelBuilder
   }
 
   /** "Overrides" the static method in {@link ManagedChannelBuilder}. */
-  public static final ComputeEngineChannelBuilder forTarget(String target) {
+  public static ComputeEngineChannelBuilder forTarget(String target) {
     return new ComputeEngineChannelBuilder(target);
   }
 

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

@@ -35,7 +35,7 @@ public final class GoogleDefaultChannelBuilder
   }
 
   /** "Overrides" the static method in {@link ManagedChannelBuilder}. */
-  public static final GoogleDefaultChannelBuilder forTarget(String target) {
+  public static GoogleDefaultChannelBuilder forTarget(String target) {
     return new GoogleDefaultChannelBuilder(target);
   }
 

alts/src/test/java/io/grpc/alts/internal/AltsHandshakerStubTest.java

@@ -32,7 +32,7 @@ import org.junit.runners.JUnit4;
 @RunWith(JUnit4.class)
 public class AltsHandshakerStubTest {
   /** Mock status of handshaker service. */
-  private static enum Status {
+  private enum Status {
     OK,
     ERROR,
     COMPLETE

core/src/testFixtures/java/io/grpc/internal/TestUtils.java

@@ -146,7 +146,7 @@ public final class TestUtils {
   }
 
   @SuppressWarnings("ReferenceEquality")
-  public static final EquivalentAddressGroup stripAttrs(EquivalentAddressGroup eag) {
+  public static EquivalentAddressGroup stripAttrs(EquivalentAddressGroup eag) {
     if (eag.getAttributes() == Attributes.EMPTY) {
       return eag;
     }

examples/src/main/java/io/grpc/examples/routeguide/RouteGuideServer.java

@@ -251,7 +251,7 @@ public class RouteGuideServer {
      * Get the notes list for the given location. If missing, create it.
      */
     private List<RouteNote> getOrCreateNotes(Point location) {
-      List<RouteNote> notes = Collections.synchronizedList(new ArrayList<RouteNote>());
+      List<RouteNote> notes = Collections.synchronizedList(new ArrayList<>());
       List<RouteNote> prevNotes = routeNotes.putIfAbsent(location, notes);
       return prevNotes != null ? prevNotes : notes;
     }