pcu_sock: comment out {dl,ul}_tbf_ext related warnings
pcu_sock: comment out {dl,ul}_tbf_ext related warnings

The gitlog shows that these warnings were added in
744f745d7a508605254afa8f78412ad410d153b0 by jolly (in 2012!).

As nobody has bothered for the past ten years, degrade them to comments.

Change-Id: Iebf9961cffbd7aa20b263f7dc0016a44782dec60
Related: osmo-bsc.git I9ef7e18f56aa86b48f0ffeec58406260736170f3

osmocom/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts