Remove VERSION

Let the version be defined by git blame when building with buck.

Change-Id: I1d33cadeab3ae7362203e3655a0c5123e8e4de94
diff --git a/VERSION b/VERSION
deleted file mode 100644
index 9e1a35c..0000000
--- a/VERSION
+++ /dev/null
@@ -1,5 +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 = '2.11.2'
-