Cleanup 1/n

Summary:
Making some changes to make this more idiomatic and abide by
the Flipper/FB standards. This one just removes some unused
variables and annotations.

Reviewed By: jknoxville

Differential Revision: D19470676

fbshipit-source-id: 4beb516f00228b1d33e4e1b42d9bc4f8c29af565

react-native/react-native-flipper/android/src/main/java/com/facebook/flipper/reactnative/FlipperPackage.java

@@ -20,8 +20,6 @@ import java.util.List;
  * application context lives shorter than the application itself, e.g. reload creates a fresh one.
  */
 public class FlipperPackage implements ReactPackage {
-  static FlipperModule flipperModule;
-
   @Override
   public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
     return Arrays.<NativeModule>asList(

react-native/react-native-flipper/android/src/main/java/com/facebook/flipper/reactnative/FlipperReactNativeJavaScriptPlugin.java

@@ -58,7 +58,7 @@ public abstract class FlipperReactNativeJavaScriptPlugin implements FlipperPlugi
   }
 
   @Override
-  public void onDisconnect() throws Exception {
+  public void onDisconnect() {
     this.module.sendJSEvent("react-native-flipper-plugin-disconnect", getPluginParams());
     this.connection = null;
   }

react-native/react-native-flipper/android/src/main/java/com/facebook/flipper/reactnative/FlipperReactNativeJavaScriptReceiver.java

@@ -31,7 +31,7 @@ public class FlipperReactNativeJavaScriptReceiver implements FlipperReceiver {
   }
 
   @Override
-  public void onReceive(FlipperObject params, FlipperResponder responder) throws Exception {
+  public void onReceive(FlipperObject params, FlipperResponder responder) {
     WritableMap eventData = Arguments.createMap();
     eventData.putString("plugin", plugin);
     eventData.putString("method", method);