1 files changed, 0 insertions, 53 deletions
diff --git a/rubocop/cop/migration/hash_index.rb b/rubocop/cop/migration/hash_index.rb
deleted file mode 100644
index 8becef891af..00000000000
--- a/rubocop/cop/migration/hash_index.rb
+++ /dev/null
@@ -1,53 +0,0 @@
-# frozen_string_literal: true
-
-require 'set'
-require_relative '../../migration_helpers'
-
-module RuboCop
-  module Cop
-    module Migration
-      # Cop that prevents the use of hash indexes in database migrations
-      class HashIndex < RuboCop::Cop::Cop
-        include MigrationHelpers
-
-        MSG = 'hash indexes should be avoided at all costs since they are not ' \
-          'recorded in the PostgreSQL WAL, you should use a btree index instead'
-
-        NAMES = Set.new([:add_index, :index, :add_concurrent_index]).freeze
-
-        def on_send(node)
-          return unless in_migration?(node)
-
-          name = node.children[1]
-
-          return unless NAMES.include?(name)
-
-          opts = node.children.last
-
-          return unless opts && opts.type == :hash
-
-          opts.each_node(:pair) do |pair|
-            next unless hash_key_type(pair) == :sym &&
-                hash_key_name(pair) == :using
-
-            if hash_key_value(pair).to_s == 'hash'
-              add_offense(pair, location: :expression)
-            end
-          end
-        end
-
-        def hash_key_type(pair)
-          pair.children[0].type
-        end
-
-        def hash_key_name(pair)
-          pair.children[0].children[0]
-        end
-
-        def hash_key_value(pair)
-          pair.children[1].children[0]
-        end
-      end
-    end
-  end
-end