commands: resolve inconsistency on sel_ctrl

The code uses self.sel_ctrl everywhere except in the two @property
methods, where the _sel_ctrl variable is used.  Let's just abandon
those property methods and make sure all users directly use the
[public] sel_ctrl member variable.

Change-Id: I10362300c1cf7b493d89bf71bbd3a10c80ef9a49

pySim/commands.py

@@ -96,13 +96,6 @@ class SimCardCommands(object):
 	def cla_byte(self, value):
 		self._cla_byte = value
 
-	@property
-	def sel_ctrl(self):
-		return self._sel_ctrl
-	@sel_ctrl.setter
-	def sel_ctrl(self, value):
-		self._sel_ctrl = value
-
 	def try_select_path(self, dir_list):
 		""" Try to select a specified path given as list of hex-string FIDs"""
 		rv = []