pdch.cpp: Drop impossible code path

In that code path, new_tbf is an UPLINK_TBF. Uplink TBFs (tbf_ul_fsm.c)
don't use state TBF_ST_WAIT_RELEASE, hence that condition cannot ever be
true.

Change-Id: I379d4140326a46e94914152fe9b735de852ceda0
---
M src/pdch.cpp
1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/pdch.cpp b/src/pdch.cpp
index f871d1d..8a2ad96 100644
--- a/src/pdch.cpp
+++ b/src/pdch.cpp
@@ -401,9 +401,6 @@
 				"TBF is gone TLLI=0x%08x\n", tlli);
 			return;
 		}
-		if (tbf->state_is(TBF_ST_WAIT_RELEASE) &&
-				tbf->direction == new_tbf->direction)
-			tbf_free(tbf);
 
 		osmo_fsm_inst_dispatch(new_tbf->state_fi, TBF_EV_ASSIGN_ACK_PACCH, NULL);
 		/* there might be LLC packets waiting in the queue, but the DL

