Revert "MM-55295: Improve DB performance of some APIs (#25318)" (#25852)

This reverts commit ec88ab4ee9.

server/channels/store/retrylayer/retrylayer.go

@@ -1049,11 +1049,11 @@ func (s *RetryLayerChannelStore) GetAll(teamID string) ([]*model.Channel, error)
 
 }
 
-func (s *RetryLayerChannelStore) GetAllChannelMemberIdsByChannelId(id string) ([]string, error) {
+func (s *RetryLayerChannelStore) GetAllChannelMembersById(id string) ([]string, error) {
 
 	tries := 0
 	for {
-		result, err := s.ChannelStore.GetAllChannelMemberIdsByChannelId(id)
+		result, err := s.ChannelStore.GetAllChannelMembersById(id)
 		if err == nil {
 			return result, nil
 		}
@@ -1748,27 +1748,6 @@ func (s *RetryLayerChannelStore) GetMemberForPost(postID string, userID string)
 
 }
 
-func (s *RetryLayerChannelStore) GetMemberOnly(ctx context.Context, channelID string, userID string) (*model.ChannelMember, error) {
-
-	tries := 0
-	for {
-		result, err := s.ChannelStore.GetMemberOnly(ctx, channelID, userID)
-		if err == nil {
-			return result, nil
-		}
-		if !isRepeatableError(err) {
-			return result, err
-		}
-		tries++
-		if tries >= 3 {
-			err = errors.Wrap(err, "giving up after 3 consecutive repeatable transaction failures")
-			return result, err
-		}
-		timepkg.Sleep(100 * timepkg.Millisecond)
-	}
-
-}
-
 func (s *RetryLayerChannelStore) GetMembers(channelID string, offset int, limit int) (model.ChannelMembers, error) {
 
 	tries := 0