Remove regsub, reconvert, regex, regex_syntax and everything under lib-old.
diff --git a/Tools/scripts/objgraph.py b/Tools/scripts/objgraph.py
index 01060f9..f74c2b6 100755
--- a/Tools/scripts/objgraph.py
+++ b/Tools/scripts/objgraph.py
@@ -22,7 +22,7 @@
 import sys
 import os
 import getopt
-import regex
+import re
 
 # Types of symbols.
 #
@@ -32,7 +32,7 @@
 
 # Regular expression to parse "nm -o" output.
 #
-matcher = regex.compile('\(.*\):\t?........ \(.\) \(.*\)$')
+matcher = re.compile('(.*):\t?........ (.) (.*)$')
 
 # Store "item" in "dict" under "key".
 # The dictionary maps keys to lists of items.