Remove Gitlab::Geo::Fdw.expire_cache! method

ee/lib/gitlab/geo/fdw.rb

@@ -7,12 +7,6 @@ module Gitlab
       FOREIGN_SERVER = 'gitlab_secondary'
       FOREIGN_SCHEMA = 'gitlab_secondary'
 
-      CACHE_KEYS = %i(
-        geo_FOREIGN_SCHEMA_exist
-        geo_foreign_schema_tables_match
-        geo_fdw_count_tables
-      ).freeze
-
       class << self
         # Return if FDW is enabled for this instance
         #
@@ -56,10 +50,6 @@ module Gitlab
           end
         end
 
-        def expire_cache!
-          Gitlab::Geo.expire_cache_keys!(CACHE_KEYS)
-        end
-
         private
 
         def fdw_capable?

ee/spec/lib/gitlab/geo/fdw_spec.rb

@@ -138,14 +138,6 @@ RSpec.describe Gitlab::Geo::Fdw, :geo do
     end
   end
 
-  describe '.expire_cache!' do
-    it 'calls Gitlab::Geo.expire_cache_keys!' do
-      expect(Gitlab::Geo).to receive(:expire_cache_keys!).with(Gitlab::Geo::Fdw::CACHE_KEYS)
-
-      described_class.expire_cache!
-    end
-  end
-
   def with_foreign_connection
     Geo::TrackingBase.connection
   end