Bug 1720023 - Add hijack-blocklists settings dump with no entries. r=sancus

Differential Revision: https://phabricator.services.mozilla.com/D120559

--HG--
extra : rebase_source : 990294963a635534f56aba22c766f5a9f8e26d50

mail/app/settings/dumps/thunderbird/hijack-blocklists.json

@@ -0,0 +1,3 @@
+{
+  "data": []
+}

mail/app/settings/dumps/thunderbird/moz.build

@@ -5,5 +5,6 @@
 # Data obtained from https://thunderbird-settings.thunderbird.net/v1/buckets/thunderbird/collections/search-config/records
 
 FINAL_TARGET_FILES.defaults.settings.thunderbird += [
+    "hijack-blocklists.json",
     "search-config.json",
 ]

mail/installer/allowed-dupes.mn

@@ -8,10 +8,8 @@
 # browser (see bug 1451050 and bug 1476934)
 defaults/settings/pinning/pins.json
 defaults/settings/main/example.json
-defaults/settings/main/search-default-override-allowlist.json
 defaults/settings/main/url-classifier-skip-urls.json
-
-defaults/settings/main/password-rules.json
+defaults/settings/thunderbird/hijack-blocklists.json
 
 # mail
 chrome/chat/content/chat/conv.html