MDEV-12353: Remove bogus conditions

page_update_max_trx_id(), page_delete_rec_list_end(): Remove conditions
on recv_recovery_is_on(). These conditions should have been removed in
or before commit f8a9f906
(removing the support for crash-upgrade).

The physical redo log based recovery will not call such high-level code.

storage/innobase/include/page0page.ic

@@ -47,13 +47,7 @@ page_update_max_trx_id(
 {
 	ut_ad(block);
 	ut_ad(mtr_memo_contains(mtr, block, MTR_MEMO_PAGE_X_FIX));
-	/* During crash recovery, this function may be called on
-	something else than a leaf page of a secondary index or the
-	insert buffer index tree (dict_index_is_sec_or_ibuf() returns
-	TRUE for the dummy indexes constructed during redo log
-	application).  In that case, PAGE_MAX_TRX_ID is unused,
-	and trx_id is usually zero. */
-	ut_ad(trx_id || recv_recovery_is_on());
+	ut_ad(trx_id);
 	ut_ad(page_is_leaf(buf_block_get_frame(block)));
 
 	if (page_get_max_trx_id(buf_block_get_frame(block)) < trx_id) {

storage/innobase/page/page0page.cc

@@ -867,15 +867,8 @@ page_delete_rec_list_end(
 		return;
 	}
 
-	if (recv_recovery_is_on()) {
-		/* If we are replaying a redo log record, we must
-		replay it exactly. Since MySQL 5.6.11, we should be
-		generating a redo log record for page creation if
-		the page would become empty. Thus, this branch should
-		only be executed when applying redo log that was
-		generated by an older version of MySQL. */
-	} else if (page_rec_is_infimum(rec)
-		   || n_recs == page_get_n_recs(block->frame)) {
+	if (page_rec_is_infimum(rec)
+	    || n_recs == page_get_n_recs(block->frame)) {
 delete_all:
 		/* We are deleting all records. */
 		page_create_empty(block, index, mtr);