diff --git a/build/mach_bootstrap.py b/build/mach_bootstrap.py
index 9b24aeb4af4..6d6f6ef453b 100644
--- a/build/mach_bootstrap.py
+++ b/build/mach_bootstrap.py
@@ -41,25 +41,6 @@ Note: `{mach} mercurial-setup` does not make any changes without prompting
 you first.
 '''.strip()
 
-OLD_MERCURIAL_TOOLS = '''
-*** MERCURIAL CONFIGURATION POTENTIALLY OUT OF DATE ***
-
-mach has detected that it has been a while since you have run
-`{mach} mercurial-setup`.
-
-Having the latest Mercurial tools and configuration should lead to a better,
-more productive experience when working on Mozilla projects.
-
-Please run `{mach} mercurial-setup` now.
-
-Reminder: `{mach} mercurial-setup` does not make any changes without
-prompting you first.
-
-To avoid this message in the future, run `{mach} mercurial-setup` once a month.
-Or, schedule `{mach} mercurial-setup --update-only` to run automatically in
-the background at least once a month.
-'''.strip()
-
 MERCURIAL_SETUP_FATAL_INTERVAL = 31 * 24 * 60 * 60
 
 
@@ -281,9 +262,6 @@ def bootstrap(topsrcdir, mozilla_dir=None):
         if mtime is None:
             print(NO_MERCURIAL_SETUP.format(mach=sys.argv[0]), file=sys.stderr)
             sys.exit(2)
-        elif time.time() - mtime > MERCURIAL_SETUP_FATAL_INTERVAL:
-            print(OLD_MERCURIAL_TOOLS.format(mach=sys.argv[0]), file=sys.stderr)
-            sys.exit(2)
 
     def populate_context(context, key=None):
         if key is None: