remove math and m module names from python driver namespace. (all math functions are merged into the local namespace)

source/blender/python/intern/bpy_driver.c

@@ -59,10 +59,6 @@ static int bpy_pydriver_create_dict(void)
 	mod = PyImport_ImportModule("math");
 	if (mod) {
 		PyDict_Merge(d, PyModule_GetDict(mod), 0); /* 0 - dont overwrite existing values */
-
-		/* Only keep for backwards compat! - just import all math into root, they are standard */
-		PyDict_SetItemString(d, "math", mod);
-		PyDict_SetItemString(d, "m", mod);
 		Py_DECREF(mod);
 	}