Remove #warnings that have been adressed since 2015

In commit 9399046729 the lookup by
TLLI, TLLI-OLD and IMSI has been implemented, but the corresponding
compile-time warning was never removed.

Change-Id: I7a1767bc7cab01048e851fd4e63112bc676d6c78

src/tbf_dl.cpp

@@ -126,8 +126,6 @@ static int tbf_new_dl_assignment(struct gprs_rlcmac_bts *bts,
 	GprsMs *ms;
 
 	/* check for uplink data, so we copy our informations */
-#warning "Do the same look up for IMSI, TLLI and OLD_TLLI"
-#warning "Refactor the below lines... into a new method"
 	ms = bts->bts->ms_store().get_ms(tlli, tlli_old, imsi);
 	if (ms) {
 		ul_tbf = ms->ul_tbf();