pcu_l1_if.cpp: Remove unused method and comment

pcu_l1_if.cpp:195:13: warning: 'void pcu_l1if_tx_bcch(uint8_t*, int)' defined but not used [-Wunused-function]
diff --git a/src/pcu_l1_if.cpp b/src/pcu_l1_if.cpp
index 037cf60..4452f0f 100644
--- a/src/pcu_l1_if.cpp
+++ b/src/pcu_l1_if.cpp
@@ -191,12 +191,6 @@
 	pcu_tx_data_req(0, 0, PCU_IF_SAPI_PCH, 0, 0, 0, data, 23+3);
 }
 
-// FIXME: remove this, when changed from c++ to c.
-static void pcu_l1if_tx_bcch(uint8_t *data, int len)
-{
-	pcu_tx_data_req(0, 0, PCU_IF_SAPI_BCCH, 0, 0, 0, data, len);
-}
-
 extern "C" int pcu_rx_data_ind_pdtch(uint8_t trx, uint8_t ts, uint8_t *data,
 	uint8_t len, uint32_t fn, int8_t rssi)
 {