Remove some more pdb.set_trace() calls from unused code

Author: edschofield

src/libfuturize/fixes/fix_UserDict.py

@@ -96,7 +96,6 @@ def transform(self, node, results):
                     self.transform(node, results)
         else:
             # Replace usage of the module.
-            import pdb; pdb.set_trace()
             bare_name = results["bare_with_attr"][0]
             new_name = self.replace.get(bare_name.value)
             if new_name:

src/libfuturize/fixes/fix_oldstr_wrap.py

@@ -27,8 +27,6 @@ class FixOldstrWrap(fixer_base.BaseFix):
     PATTERN = "STRING"
 
     def transform(self, node, results):
-        import pdb
-        pdb.set_trace()
         if node.type == token.STRING:
             touch_import_top(u'past.types', u'oldstr', node)
             if _literal_re.match(node.value):

src/libfuturize/fixes/fix_order___future__imports.py

@@ -28,8 +28,6 @@ class FixOrderFutureImports(fixer_base.BaseFix):
     #     Match only once per file
     #     """
     #     if hasattr(node, 'type') and node.type == syms.file_input:
-    #         import pdb
-    #         pdb.set_trace()
     #         return True
     #     return False