--- a/mozilla/project_branches.py
+++ b/mozilla/project_branches.py
@@ -228,22 +228,18 @@ PROJECT_BRANCHES = {
             'win32-debug': {},
             'win64': {},
             'win64-debug': {},
             'macosx64': {},
             'macosx64-st-an-debug': {},
         }
     },
     'larch': {
-        'enable_nightly': True,
         'lock_platforms': True,
         'platforms': {
-            'linux64': {},
-            'macosx64': {},
-            'win64': {},
         },
     },
     'maple': {
         'enable_nightly': True,
         'updates_enabled': True,
         'create_partial': True,
         'nightly_signing_servers': 'nightly-signing',
     },