Bug 975774 - Part 5: clean up imports in Axis. r=trivial

mobile/android/base/gfx/Axis.java

@@ -5,18 +5,16 @@
 
 package org.mozilla.gecko.gfx;
 
+import java.util.HashMap;
+import java.util.Map;
+
 import org.mozilla.gecko.GeckoAppShell;
 import org.mozilla.gecko.PrefsHelper;
 import org.mozilla.gecko.util.FloatUtils;
 
-import org.json.JSONArray;
-
 import android.util.Log;
 import android.view.View;
 
-import java.util.HashMap;
-import java.util.Map;
-
 /**
  * This class represents the physics for one axis of movement (i.e. either
  * horizontal or vertical). It tracks the different properties of movement