scripts: twister: sort expr_parser.py imports

Just tidying up.

Signed-off-by: Martí Bolívar <[email protected]>

Author: mbolivar-nordic

scripts/pylib/twister/expr_parser.py

@@ -4,11 +4,11 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 
-import sys
-import os
 import copy
-import threading
+import os
 import re
+import sys
+import threading
 
 try:
     import ply.lex as lex