diff --git a/moz.configure b/moz.configure
index 7b4c92126281..1a9566572d54 100755
--- a/moz.configure
+++ b/moz.configure
@@ -365,19 +365,6 @@ def tup_progs(build_backends):
 
 tup = check_prog('TUP', tup_progs)
 
-# watchman detection
-# ==============================================================
-
-watchman = check_prog('WATCHMAN', ('watchman',), allow_missing=True)
-
-@depends_if(watchman)
-@checking('for watchman version')
-@imports('json')
-def watchman_version(watchman):
-    out = check_cmd_output(watchman, 'version')
-    res = json.loads(out)
-    return Version(res['version'])
-
 # Miscellaneous programs
 # ==============================================================
 check_prog('DOXYGEN', ('doxygen',), allow_missing=True)