Revert "MDEV-22830: SQL_CALC_FOUND_ROWS not working properly for single SELECT for DUAL"

This reverts commit 44339123.

mysql-test/r/select_found.result

@@ -362,9 +362,4 @@ c1
 select found_rows();
 found_rows()
 5
-SELECT SQL_CALC_FOUND_ROWS 1 FROM DUAL WHERE 0;
-1
-SELECT FOUND_ROWS();
-FOUND_ROWS()
-1
 drop table t1;

mysql-test/t/select_found.test

@@ -286,11 +286,4 @@ select * from t1 order by c1 limit 2,1;
 select found_rows();
 select sql_calc_found_rows * from t1 order by c1 limit 2,1;
 select found_rows();
-
-#
-# MDEV-22830 SQL_CALC_FOUND_ROWS not working properly for single SELECT for DUAL
-#
-SELECT SQL_CALC_FOUND_ROWS 1 FROM DUAL WHERE 0;
-SELECT FOUND_ROWS();
-
 drop table t1;

sql/sql_select.cc

@@ -2647,7 +2647,7 @@ void JOIN::exec_inner()
                          thd->get_sent_row_count());
       }
       else
-        send_records= (select_options & OPTION_FOUND_ROWS) ? 1 : 0;
+        send_records= 0;
       if (!error)
       {
         join_free();                      // Unlock all cursors