Removing some Launcher3 dependencies from BaseIconCache

Change-Id: Ic80ed4a5cd2fc414cd6c27096d798e7f0b8efc72

src/com/android/launcher3/Utilities.java

@@ -356,25 +356,6 @@ public final class Utilities {
         return null;
     }
 
-    /**
-     * Compresses the bitmap to a byte array for serialization.
-     */
-    public static byte[] flattenBitmap(Bitmap bitmap) {
-        // Try go guesstimate how much space the icon will take when serialized
-        // to avoid unnecessary allocations/copies during the write.
-        int size = bitmap.getWidth() * bitmap.getHeight() * 4;
-        ByteArrayOutputStream out = new ByteArrayOutputStream(size);
-        try {
-            bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
-            out.flush();
-            out.close();
-            return out.toByteArray();
-        } catch (IOException e) {
-            Log.w(TAG, "Could not write bitmap");
-            return null;
-        }
-    }
-
     /**
      * Trims the string, removing all whitespace at the beginning and end of the string.
      * Non-breaking whitespaces are also removed.