bssgp: Remove newly added log line warning about NOOP

osmo-pcu unit tests fail ue to this new log line. Let's rather simply
leave a comment there, since anyway known apps will be migrating soon
the new APIs.

Fixes: fde19ed579c3145959301bbe75fde15509276040
Change-Id: Ib9bf528db08f7aaa4adaf7b6a320679a4f11a53d
diff --git a/src/gb/gprs_bssgp.c b/src/gb/gprs_bssgp.c
index b5dec58..696c451 100644
--- a/src/gb/gprs_bssgp.c
+++ b/src/gb/gprs_bssgp.c
@@ -1352,7 +1352,9 @@
 
 void bssgp_set_log_ss(int ss)
 {
-	LOGP(DLGLOBAL, LOGL_ERROR, "BSSGP has moved from DGPRS to DLGPRS, please update your code\n");
+	/* BSSGP has moved from DGPRS to DLGPRS, please update your code if it's
+	 * still calling this function
+	 */
 }
 
 /*!