Stop overriding direction code

rt2ms_py3/parameter_file.py

@@ -188,12 +188,6 @@ class Parameters():
         if not station:
             station = 'STA'
         old_channel = channel
-        if refchan == '1' and channel[-1] != 'Z':
-            channel = channel[:-1] + 'Z'
-        if refchan == '2' and channel[-1] != '1':
-            channel = channel[:-1] + str(1)
-        if refchan == '3' and channel[-1] != '2':
-            channel = channel[:-1] + str(2)
         band_code = infer_band_code(float(samplerate), int(gain))
         inst_code = infer_inst_code(int(gain))
         # A correct channel name should be three character long: