Don't try freeing resources on a different thread..

This call to freeResources happens on the main thread.
It's also not really useful. The geometry instance
shouldn't be shared either.

bug:8522497
Change-Id: I7b144713428ab803b3640b3d8226fd862db824f4
diff --git a/src/com/android/gallery3d/filtershow/cache/CachingPipeline.java b/src/com/android/gallery3d/filtershow/cache/CachingPipeline.java
index ecfdaba..752e1c2 100644
--- a/src/com/android/gallery3d/filtershow/cache/CachingPipeline.java
+++ b/src/com/android/gallery3d/filtershow/cache/CachingPipeline.java
@@ -309,7 +309,6 @@
             }
             setupEnvironment(preset, false);
             mEnvironment.setQuality(ImagePreset.QUALITY_PREVIEW);
-            mFiltersManager.freeFilterResources(preset);
             bitmap = preset.applyGeometry(bitmap, mEnvironment);
             return bitmap;
         }