--- a/mozilla/thunderbird_config.py
+++ b/mozilla/thunderbird_config.py
@@ -751,16 +751,20 @@ BRANCHES['comm-central']['create_partial
 BRANCHES['comm-central']['create_partial_l10n'] = False
 BRANCHES['comm-central']['enable_blocklist_update'] = True
 BRANCHES['comm-central']['file_update_on_closed_tree'] = False
 BRANCHES['comm-central']['platforms']['linux']['nightly_signing_servers'] = 'nightly-signing'
 BRANCHES['comm-central']['platforms']['linux64']['nightly_signing_servers'] = 'nightly-signing'
 BRANCHES['comm-central']['platforms']['win32']['nightly_signing_servers'] = 'nightly-signing'
 BRANCHES['comm-central']['platforms']['win64']['nightly_signing_servers'] = 'nightly-signing'
 BRANCHES['comm-central']['platforms']['macosx64']['nightly_signing_servers'] = 'nightly-signing'
+del BRANCHES['comm-central']['platforms']['linux-debug']
+del BRANCHES['comm-central']['platforms']['linux64-debug']
+del BRANCHES['comm-central']['platforms']['win32-debug']
+del BRANCHES['comm-central']['platforms']['macosx64-debug']
 
 ######## comm-esr52
 BRANCHES['comm-esr52']['repo_path'] = 'releases/comm-esr52'
 BRANCHES['comm-esr52']['moz_repo_path'] = 'releases/mozilla-esr52'
 BRANCHES['comm-esr52']['update_channel'] = 'nightly-esr52'
 BRANCHES['comm-esr52']['skip_blank_repos'] = True
 BRANCHES['comm-esr52']['call_client_py'] = True
 BRANCHES['comm-esr52']['l10n_repo_path'] = 'releases/l10n/mozilla-release'