Remove obsolete 'c_mangle' method

Cython/Compiler/Symtab.py

@@ -460,9 +460,6 @@ class Scope(object):
         else:
             return self.parent_scope.mangle(prefix, self.name)
 
-    # mangle cypclass related C names in the global namespace
-    c_mangle = mangle
-
     def mangle_internal(self, name):
         # Mangle an internal name so as not to clash with any
         # user-defined name in this scope.
@@ -2744,13 +2741,6 @@ class CppClassScope(Scope):
         self.inherited_var_entries = []
         self.inherited_type_entries = []
         self.reifying_entries = []
-        # _scope_prefix is used interally for mangling in cases where c++ namespaces aren't used
-        # it is used in conjunction with 'c_mangle'
-        if (outer_scope):
-            outer_prefix = outer_scope._scope_prefix if outer_scope.is_cpp_class_scope else outer_scope.scope_prefix
-            self._scope_prefix = outer_prefix + self.scope_prefix
-        else:
-            self._scope_prefix = self.scope_prefix
         if templates is not None:
             for T in templates:
                 template_entry = self.declare(
@@ -3115,20 +3105,6 @@ class CppClassScope(Scope):
                     name = 'operator ' + as_operator_name
         return super(CppClassScope,self).lookup_here(name)
 
-    # mangle names in the global namespace.
-    # Normally 'mangle' would be used for this, but CppClassScope doesn't
-    # have a parent_scope, and therefore no qualified 'scope_prefix':
-    # unneeded thanks to C++ namespaces.
-    # '_scope_prefix' is used instead to use a scope-qualified name
-    # only when required.
-    def c_mangle(self, prefix, name = None):
-        if name:
-            return "%s%s%s" % (prefix, self._scope_prefix, name)
-        elif self.outer_scope:
-            return self.outer_scope.mangle(prefix, self.name)
-        else:
-            return self.mangle(prefix, name)
-
 
 class CppScopedEnumScope(Scope):
     #  Namespace of a ScopedEnum