MDEV-26110 fixup: GCC 4.8.5 -Wtype-limits

row_ins_index_entry_set_vals(): Remove an assertion that trivially
holds because the 16-bit dict_col_t::len cannot represent the value
UNIV_PAGE_SIZE_MAX.

storage/innobase/row/row0ins.cc

@@ -3424,7 +3424,6 @@ row_ins_index_entry_set_vals(
 				field->len = UNIV_SQL_NULL;
 				field->type.prtype = DATA_BINARY_TYPE;
 			} else {
-				ut_ad(col->len <= UNIV_PAGE_SIZE_MAX);
 				ut_ad(ind_field->fixed_len <= col->len);
 				dfield_set_data(field, field_ref_zero,
 						ind_field->fixed_len);