Remove third_party/golang.org/x/mobile as it is no longer used with Go 1.5.

third_party/go/src/golang.org/x/mobile/app/Go.java

Index: third_party/go/src/golang.org/x/mobile/app/Go.java
diff --git a/third_party/go/src/golang.org/x/mobile/app/Go.java b/third_party/go/src/golang.org/x/mobile/app/Go.java
deleted file mode 100644
index 3502d4ba3942d1d95904748e630f4d43bc3a482f..0000000000000000000000000000000000000000
--- a/third_party/go/src/golang.org/x/mobile/app/Go.java
+++ /dev/null
@@ -1,46 +0,0 @@
-package go;
-
-import android.content.Context;
-import android.os.Looper;
-import android.util.Log;
-
-// Go is an entry point for libraries compiled in Go.
-// In an app's Application.onCreate, call:
-//
-// 	Go.init(getApplicationContext());
-//
-// When the function returns, it is safe to start calling
-// Go code.
-public final class Go {
-	// init loads libgojni.so and starts the runtime.
-	public static void init(final Context ctx) {
-		if (Looper.myLooper() != Looper.getMainLooper()) {
-			Log.wtf("Go", "Go.init must be called from main thread (looper="+Looper.myLooper().toString()+")");
-		}
-		if (running) {
-			return;
-		}
-		running = true;
-
-		// TODO(crawshaw): context.registerComponentCallbacks for runtime.GC
-
-		System.loadLibrary("gojni");
-
-		new Thread("GoMain") {
-			public void run() {
-				Go.run(ctx);
-			}
-		}.start();
-
-		Go.waitForRun();
-
-        new Thread("GoReceive") {
-            public void run() { Seq.receive(); }
-        }.start();
-	}
-
-	private static boolean running = false;
-
-	private static native void run(Context ctx);
-	private static native void waitForRun();
-}