Revert "makefile changes for gcm javadocs"

We don't build it, nor do we have these sources.

This reverts commit 5f9922d7c3bce158e4c7a58929d4075e7c91e32e.

Change-Id: I877e617f90de1b832e26c98adbafc6238b98882f
remove dependency if airplane mode is not set

Change-Id: I8c01b4ac9cea8271b4a8140b24cfa56280435448