Revert "Bump rubocop-discourse to 2.3.0."

Revert “Bump rubocop-discourse to 2.3.0.”

This reverts commit a3ed7c9279a05b51a51d6e8331156827b8e64d0c.

diff --git a/.rubocop.yml b/.rubocop.yml
index 2aeb8d9..b7edfe4 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -7,7 +7,3 @@ Discourse/NoAddReferenceOrAliasesActiveRecordMigration:
 
 Discourse/NoResetColumnInformationInMigrations:
   Enabled: true
-
-# TODO: Still need to fix all the existing tests but we shouldn't block future upgrades
-Discourse/NoMockingJobs:
-  Enabled: false
diff --git a/Gemfile.lock b/Gemfile.lock
index 1de2dd8..b460b62 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -359,7 +359,7 @@ GEM
       unicode-display_width (>= 1.4.0, < 2.0)
     rubocop-ast (0.2.0)
       parser (>= 2.7.0.1)
-    rubocop-discourse (2.3.0)
+    rubocop-discourse (2.2.0)
       rubocop (>= 0.69.0)
       rubocop-rspec (>= 1.39.0)
     rubocop-rspec (1.42.0)

GitHub sha: 1b572766