Remove VERSION

Let the plugin version be generate from git describe rather than
being hard-coded.

Change-Id: I3d600898ce88dd9330728216d0c90922627ee878

VERSION

diff --git a/VERSION b/VERSION
deleted file mode 100644
index f5bb986..0000000
--- a/VERSION
+++ /dev/null
@@ -1,4 +0,0 @@
-# Used by BUCK to include "Implementation-Version" in plugin Manifest.
-# If this file doesn't exist the output of 'git describe' is used
-# instead.
-PLUGIN_VERSION = '2.11'