1 files changed, 0 insertions, 36 deletions
diff --git a/db/migrate/20160725104020_merge_request_diff_remove_uniq.rb b/db/migrate/20160725104020_merge_request_diff_remove_uniq.rb
deleted file mode 100644
index d8b4696a246..00000000000
--- a/db/migrate/20160725104020_merge_request_diff_remove_uniq.rb
+++ /dev/null
@@ -1,36 +0,0 @@
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-# rubocop:disable RemoveIndex
-class MergeRequestDiffRemoveUniq < ActiveRecord::Migration[4.2]
-  include Gitlab::Database::MigrationHelpers
-  disable_ddl_transaction!
-
-  DOWNTIME = false
-
-  def up
-    constraint_name = 'merge_request_diffs_merge_request_id_key'
-
-    transaction do
-      if index_exists?(:merge_request_diffs, :merge_request_id)
-        remove_index(:merge_request_diffs, :merge_request_id)
-      end
-
-      # In some bizarre cases PostgreSQL might have a separate unique constraint
-      # that we'll need to drop.
-      if constraint_exists?(constraint_name) && Gitlab::Database.postgresql?
-        execute("ALTER TABLE merge_request_diffs DROP CONSTRAINT IF EXISTS #{constraint_name};")
-      end
-    end
-  end
-
-  def down
-    unless index_exists?(:merge_request_diffs, :merge_request_id)
-      add_concurrent_index(:merge_request_diffs, :merge_request_id, unique: true)
-    end
-  end
-
-  def constraint_exists?(name)
-    indexes(:merge_request_diffs).map(&:name).include?(name)
-  end
-end