Bug 1668908 - beta to release migration needs to unset EARLY_BETA_OR_EARLIER. r=releng-reviewers,jlorenzo DONTBUILD

This should help beta simulations as well as act as a safeguard in case
the update is missed during beta.

Differential Revision: https://phabricator.services.mozilla.com/D92600

taskcluster/ci/config.yml

@@ -318,7 +318,10 @@ merge-automation:
             version-files:
                 - filename: "browser/config/version_display.txt"
                   new-suffix: ''
-            replacements: []
+            replacements:
+                - - build/defines.sh
+                  - EARLY_BETA_OR_EARLIER=1
+                  - EARLY_BETA_OR_EARLIER=
             merge-old-head: true
             base-tag: 'FIREFOX_RELEASE_{major_version}_BASE'
             end-tag: 'FIREFOX_RELEASE_{major_version}_END'

testing/mozharness/configs/merge_day/beta_to_release.py

@@ -12,6 +12,9 @@ config = {
     ],
     "replacements": [
         # File, from, to
+        ('build/defines.sh',
+         'EARLY_BETA_OR_EARLIER=1',
+         'EARLY_BETA_OR_EARLIER='),
     ],
 
     "vcs_share_base": os.path.join(ABS_WORK_DIR, 'hg-shared'),