Revert "Revert "Revert "Revert "Removing N from PLATFORM_VERSION_ALL_CODENAMES""""

This reverts commit 266600b6391a142c1127db2c2dd738cb1bc7a0df.

Bug: 29117805
Change-Id: Idfc80ee1a91f76088c59a2ebe29a3d96bf02bf03
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index bdfc65a..5acd4dd 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -75,7 +75,7 @@
   # This is all of the development codenames that are active.  Should be either
   # the same as PLATFORM_VERSION_CODENAME or a comma-separated list of additional
   # codenames after PLATFORM_VERSION_CODENAME.
-  PLATFORM_VERSION_ALL_CODENAMES := $(PLATFORM_VERSION_CODENAME),N
+  PLATFORM_VERSION_ALL_CODENAMES := $(PLATFORM_VERSION_CODENAME)
 endif
 
 ifeq "REL" "$(PLATFORM_VERSION_CODENAME)"