Remove FDW schema up-to-date check

Since Gitlab 13.2 we don't rely on FDW

ee/lib/system_check/geo/fdw_schema_up_to_date_check.rb

-# frozen_string_literal: true
-
-module SystemCheck
-  module Geo
-    class FdwSchemaUpToDateCheck < SystemCheck::BaseCheck
-      set_name 'GitLab Geo tracking database Foreign Data Wrapper schema is up-to-date?'
-
-      NOT_SECONDARY_NODE = 'not a secondary node'.freeze
-      FDW_NOT_CONFIGURED = 'foreign data wrapper is not configured'.freeze
-
-      def skip?
-        unless Gitlab::Geo.secondary?
-          self.skip_reason = NOT_SECONDARY_NODE
-
-          return true
-        end
-
-        unless Gitlab::Geo::Fdw.enabled?
-          self.skip_reason = FDW_NOT_CONFIGURED
-
-          return true
-        end
-
-        false
-      end
-
-      def check?
-        Gitlab::Geo::Fdw.foreign_tables_up_to_date?
-      end
-
-      def show_error
-        try_fixing_it(
-          'Run the following command to refresh the FDW schema:',
-          'gitlab-rake geo:db:refresh_foreign_tables'
-        )
-
-        for_more_information('doc/administration/geo/replication/troubleshooting.md#geo-database-has-an-outdated-fdw-remote-schema-error')
-      end
-    end
-  end
-end

ee/lib/system_check/rake_task/geo_task.rb

@@ -37,7 +37,6 @@ module SystemCheck
           SystemCheck::Geo::DatabaseReplicationEnabledCheck,
           SystemCheck::Geo::DatabaseReplicationWorkingCheck,
           SystemCheck::Geo::FdwEnabledCheck,
-          SystemCheck::Geo::FdwSchemaUpToDateCheck,
           SystemCheck::Geo::HttpConnectionCheck
         ] + common_checks
       end

ee/spec/lib/system_check/geo/fdw_schema_up_to_date_check_spec.rb

-# frozen_string_literal: true
-
-require 'spec_helper'
-require 'rake_helper'
-
-RSpec.describe SystemCheck::Geo::FdwSchemaUpToDateCheck, :geo do
-  describe '#skip?' do
-    it 'skips when Geo is disabled' do
-      allow(Gitlab::Geo).to receive(:enabled?) { false }
-
-      expect(subject.skip?).to be_truthy
-      expect(subject.skip_reason).to eq('not a secondary node')
-    end
-
-    it 'skips when Geo is enabled but its a primary node' do
-      allow(Gitlab::Geo).to receive(:enabled?) { true }
-      allow(Gitlab::Geo).to receive(:secondary?) { false }
-
-      expect(subject.skip?).to be_truthy
-      expect(subject.skip_reason).to eq('not a secondary node')
-    end
-
-    it 'skips when FDW is disabled' do
-      allow(Gitlab::Geo).to receive(:enabled?) { true }
-      allow(Gitlab::Geo).to receive(:secondary?) { true }
-      allow(Gitlab::Geo::Fdw).to receive(:enabled?) { false }
-
-      expect(subject.skip?).to be_truthy
-      expect(subject.skip_reason).to eq('foreign data wrapper is not configured')
-    end
-
-    it 'does not skip when Geo is enabled, its a secondary node and FDW is enabled' do
-      allow(Gitlab::Geo).to receive(:enabled?) { true }
-      allow(Gitlab::Geo).to receive(:secondary?) { true }
-      allow(Gitlab::Geo::Fdw).to receive(:enabled?) { true }
-
-      expect(subject.skip?).to be_falsey
-    end
-  end
-
-  context 'with functional FDW environment', :geo_fdw do
-    it 'returns true' do
-      expect(subject.check?).to be_truthy
-    end
-  end
-end

ee/spec/lib/system_check/rake_task/geo_task_spec.rb

@@ -26,7 +26,6 @@ RSpec.describe SystemCheck::RakeTask::GeoTask do
       SystemCheck::Geo::DatabaseReplicationEnabledCheck,
       SystemCheck::Geo::DatabaseReplicationWorkingCheck,
       SystemCheck::Geo::FdwEnabledCheck,
-      SystemCheck::Geo::FdwSchemaUpToDateCheck,
       SystemCheck::Geo::HttpConnectionCheck
     ] + common_checks
   end