Remove 'MANIFEST.in'

Everything in this file is automatically generated by pbr.
There appears to be no good reason to keep it around.

TrivialFix

Change-Id: Iec3f2d28d46638f3cfcfaaeaa621f5355329044e
diff --git a/MANIFEST.in b/MANIFEST.in
deleted file mode 100644
index c978a52..0000000
--- a/MANIFEST.in
+++ /dev/null
@@ -1,6 +0,0 @@
-include AUTHORS
-include ChangeLog
-exclude .gitignore
-exclude .gitreview
-
-global-exclude *.pyc