Remove field_name_table for now

It is decided to leave this until later
as it does impose complexity on go indexer.

ee/lib/elastic/latest/git_instance_proxy.rb

@@ -3,22 +3,6 @@
 module Elastic
   module Latest
     module GitInstanceProxy
-      GITALY_TRANSFORM_TABLES = {
-        commit: {
-          'Type' => 'type',
-          'Author' => 'author',
-          'Committer' => 'committer',
-          'RepoID' => 'rid',
-          'Message' => 'message',
-          'SHA' => 'sha'
-        },
-        blob: {
-          'Type' => 'type',
-          'OID' => 'oid',
-          'RepoID' => 'rid'
-        }
-      }.freeze
-
       def self.methods_for_all_write_targets
         super + [:delete_index_for_commits_and_blobs]
       end

ee/lib/gitlab/elastic/indexer.rb

@@ -107,7 +107,6 @@ module Gitlab
 
       def elasticsearch_config(target)
         config = Gitlab::CurrentSettings.elasticsearch_config.dup
-        config[:field_name_table] = target.real_class::GITALY_TRANSFORM_TABLES
         config[:index_name] = target.index_name
         config.to_json
       end

ee/spec/lib/gitlab/elastic/indexer_spec.rb

@@ -284,7 +284,6 @@ describe Gitlab::Elastic::Indexer do
   def elasticsearch_config
     config = Gitlab::CurrentSettings.elasticsearch_config.dup
     config.merge!(
-      field_name_table: Elastic::Latest::GitInstanceProxy::GITALY_TRANSFORM_TABLES,
       index_name: 'gitlab-test'
     )
   end