Remove unused variables

core/src/test/java/io/grpc/ChannelImplTest.java

@@ -215,7 +215,6 @@ public class ChannelImplTest {
         return null;
       }
     }).when(mockTransport2).start(any(ClientTransport.Listener.class));
-    Exception ex = new IllegalStateException("Transport shutdown");
     when(mockTransport2.newStream(same(method), same(headers2), any(ClientStreamListener.class)))
         .thenReturn(mockStream2);
     call.start(mockCallListener2, headers2);

okhttp/src/main/java/com/squareup/okhttp/internal/OkHttpProtocolNegotiator.java

@@ -118,7 +118,6 @@ public class OkHttpProtocolNegotiator {
     // byte[] getNpnSelectedProtocol()
     private static final OptionalMethod<Socket> GET_NPN_SELECTED_PROTOCOL =
         new OptionalMethod<Socket>(byte[].class, "getNpnSelectedProtocol");
-    private static boolean android;
 
     @Override
     public String negotiate(SSLSocket sslSocket, String hostname, List<Protocol> protocols)