qcacld-3.0: Remove last bit of LIBRA_LINUX_PC feature code

A prior version of the driver had LIBRA_LINUX_PC feature code, but it
has all been removed except for one piece, so remove that last bit
which conditionally defines HDD_TX_TIMEOUT.

Change-Id: Ie714b134b789a4649f8da7bbf5e98f36d27ed4ff
CRs-Fixed: 2362718
1 file changed