Doc change: Remove redundant dir and image.

Change-Id: I6867250f48b71d857b1cf80f28392ec9879005c7
diff --git a/tools/droiddoc/templates/assets/images/home/gingerdroid.png b/tools/droiddoc/templates/assets/images/home/gingerdroid.png
deleted file mode 100644
index 8399d84..0000000
--- a/tools/droiddoc/templates/assets/images/home/gingerdroid.png
+++ /dev/null
Binary files differ