net: qualcomm: rmnet: Remove some unused defines

Most of these constants were used in the initial patchset where
custom netlink configuration was used and hence are no longer relevant.

CRs-Fixed: 2156182
Change-Id: Ib172e6768351390ef20a33451ae02a167998a1b2
Signed-off-by: David S. Miller <davem@davemloft.net>
Git-commit: 1281726ec341702b16c3e67ea37ba485cf72ee66
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>