lib-storage: Remove index_storage_save_continue

It was not intended for v2.2

src/lib-storage/index/index-storage.c

@@ -1073,48 +1073,6 @@ int index_storage_expunged_sync_begin(struct mailbox *box,
 	return 1;
 }
 
-int index_storage_save_continue(struct mail_save_context *ctx,
-				struct istream *input,
-				struct mail *cache_dest_mail)
-{
-	struct mail_storage *storage = ctx->transaction->box->storage;
-
-	do {
-		switch (o_stream_send_istream(ctx->data.output, input)) {
-		case OSTREAM_SEND_ISTREAM_RESULT_FINISHED:
-			break;
-		case OSTREAM_SEND_ISTREAM_RESULT_WAIT_INPUT:
-			break;
-		case OSTREAM_SEND_ISTREAM_RESULT_WAIT_OUTPUT:
-			i_unreached();
-		case OSTREAM_SEND_ISTREAM_RESULT_ERROR_INPUT:
-			/* handle below */
-			break;
-		case OSTREAM_SEND_ISTREAM_RESULT_ERROR_OUTPUT:
-			if (!mail_storage_set_error_from_errno(storage)) {
-				mail_storage_set_critical(storage,
-					"save: write(%s) failed: %s",
-					o_stream_get_name(ctx->data.output),
-					o_stream_get_error(ctx->data.output));
-			}
-			return -1;
-		}
-		if (cache_dest_mail != NULL)
-			index_mail_cache_parse_continue(cache_dest_mail);
-
-		/* both tee input readers may consume data from our primary
-		   input stream. we'll have to make sure we don't return with
-		   one of the streams still having data in them. */
-	} while (i_stream_read(input) > 0);
-
-	if (input->stream_errno != 0) {
-		mail_storage_set_critical(storage, "save: read(%s) failed: %s",
-			i_stream_get_name(input), i_stream_get_error(input));
-		return -1;
-	}
-	return 0;
-}
-
 void index_storage_save_abort_last(struct mail_save_context *ctx, uint32_t seq)
 {
 	struct index_mail *imail = (struct index_mail *)ctx->dest_mail;

src/lib-storage/index/index-storage.h

@@ -180,9 +180,6 @@ int index_storage_expunged_sync_begin(struct mailbox *box,
 				      enum mail_index_sync_flags flags);
 void index_storage_expunging_deinit(struct mailbox *box);
 
-int index_storage_save_continue(struct mail_save_context *ctx,
-				struct istream *input,
-				struct mail *cache_dest_mail);
 void index_storage_save_abort_last(struct mail_save_context *ctx, uint32_t seq);
 
 #endif