Stop building rmnetcli

This doesn't build anymore and doesn't seem to be of any use.

Change-Id: I7c0bf53fbb6aa0c69f0ce4026278829aab22a605
diff --git a/common.mk b/common.mk
index f8fc910..fbbac62 100644
--- a/common.mk
+++ b/common.mk
@@ -132,7 +132,6 @@
 
 #DATA_OS
 DATA_OS := librmnetctl
-DATA_OS += rmnetcli
 
 #E2FSPROGS
 E2FSPROGS := e2fsck