remove some unused code

mmgen/proto/btc/tx/new.py

@@ -65,10 +65,7 @@ class New(Base,TxBase.New):
 
 	# given tx size, rel fee and units, return absolute fee
 	def fee_rel2abs(self, tx_size, units, amt_in_units, unit):
-		if tx_size:
-			return self.proto.coin_amt(amt_in_units * tx_size, from_unit=units[unit])
-		else:
-			return None
+		return self.proto.coin_amt(amt_in_units * tx_size, from_unit=units[unit])
 
 	# given network fee estimate in BTC/kB, return absolute fee using estimated tx size
 	def fee_est2abs(self,fee_per_kb,fe_type=None):

mmgen/xmrwallet.py

@@ -154,15 +154,6 @@ class XMRWalletAddrSpec(HiliteStr,InitErrors,MMGenObject):
 		except Exception as e:
 			return cls.init_fail(e,me)
 
-def is_xmr_tx_file(cfg,fn):
-	try:
-		MoneroMMGenTX.Completed(cfg,fn)
-		return True
-	except Exception as e:
-		if not 'MoneroMMGenTXFileParseError' in type(e).__name__:
-			ymsg(f'\n{type(e).__name__}: {e}')
-		return False
-
 class MoneroMMGenFile:
 
 	silent_load = False

test/cmdtest_py_d/ct_regtest.py

@@ -1124,7 +1124,7 @@ class CmdTestRegtest(CmdTestBase,CmdTestShared):
 
 	def alice_send_estimatefee(self):
 		outputs_cl = self._create_tx_outputs('bob',(('L',1,''),)) # bob_sid:L:1
-		return self.user_txdo('alice',None,outputs_cl,'1') # fee=None
+		return self.user_txdo('alice', None, outputs_cl, '1', extra_args=['--verbose']) # fee=None
 
 	def user_txbump(
 			self,