Drop duplicate log line

Same line (or similar if run_diag) is logged immediately below, showing
up twice in log which is confusing:

"""
20210726171543005 DTBF tbf.cpp:455 TBF(TFI=2 TLLI=0xfe563576 DIR=DL STATE=WAIT_RELEASE EGPRS) T3193 timeout expired, freeing TBF
20210726171543005 DTBF tbf.cpp:462 TBF(TFI=2 TLLI=0xfe563576 DIR=DL STATE=WAIT_RELEASE EGPRS) T3193 timeout expired, freeing TBF
"""

Change-Id: Ie171c458e670f8471ac93f78520a05926114c974
diff --git a/src/tbf.cpp b/src/tbf.cpp
index 107c867..6ed8e3d 100644
--- a/src/tbf.cpp
+++ b/src/tbf.cpp
@@ -452,9 +452,6 @@
 
 static inline void tbf_timeout_free(struct gprs_rlcmac_tbf *tbf, enum tbf_timers t, bool run_diag)
 {
-	LOGPTBF(tbf, LOGL_NOTICE, "%s timeout expired, freeing TBF\n",
-		get_value_string(tbf_timers_names, t));
-
 	if (run_diag) {
 		LOGPTBF(tbf, LOGL_NOTICE, "%s timeout expired, freeing TBF: %s\n",
 			get_value_string(tbf_timers_names, t), tbf->rlcmac_diag().c_str());