remove .gitreview file on github

Change-Id: If4bb89fd796fbfe60b4c3a34a82d15872ae45ea5
diff --git a/.gitreview b/.gitreview
deleted file mode 100644
index 796cb52..0000000
--- a/.gitreview
+++ /dev/null
@@ -1,4 +0,0 @@
-[gerrit]
-host=gerrit.mcp.mirantis.net
-port=29418
-project=salt-formulas/horizon.git