Remove old asset.

Change-Id: I5b4bdb6b038bba3eb2f03c6f53541d99fab0bad5
diff --git a/core/res/assets/webkit/togglePluginBg.png b/core/res/assets/webkit/togglePluginBg.png
deleted file mode 100644
index 2c65acb..0000000
--- a/core/res/assets/webkit/togglePluginBg.png
+++ /dev/null
Binary files differ