remove environment parameter and pass it via initialisation

src/fenrir-package/commands/commands/clear_clipboard.py

@@ -10,16 +10,16 @@ class command():
     def __init__(self):
         pass
     def initialize(self, environment):
-        pass
-    def shutdown(self, environment):
+        self.env = environment
+    def shutdown(self):
         pass 
-    def getDescription(self, environment):
+    def getDescription(self):
         return 'clears the currently selected clipboard'     
 
-    def run(self, environment):
-        environment['commandBuffer']['currClipboard'] = -1
-        del environment['commandBuffer']['clipboard'][:]
-        environment['runtime']['outputManager'].presentText(environment, 'clipboard cleared', interrupt=True)
+    def run(self):
+        self.env['commandBuffer']['currClipboard'] = -1
+        del self.env['commandBuffer']['clipboard'][:]
+        self.env['runtime']['outputManager'].presentText('clipboard cleared', interrupt=True)
         return                
     def setCallback(self, callback):
         pass