Clean up a test

Changed global parameters will be reset by server restart.
There is no need to save and restore the original values.

mysql-test/suite/encryption/r/innodb-key-rotation-disable.result

@@ -62,5 +62,4 @@ FOUND /public/ in t7.ibd
 FOUND /public/ in t8.ibd
 # t9 page compressed expecting NOT FOUND
 NOT FOUND /public/ in t9.ibd
-use test;
 drop database enctests;

mysql-test/suite/encryption/t/innodb-key-rotation-disable.test

@@ -8,9 +8,6 @@ SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_
 
 --disable_query_log
 --disable_warnings
-let $innodb_compression_algorithm_orig=`SELECT @@innodb_compression_algorithm`;
-let $innodb_file_format_orig = `SELECT @@innodb_file_format`;
-let $innodb_file_per_table_orig = `SELECT @@innodb_file_per_table`;
 let $encryption = `SELECT @@innodb_encrypt_tables`;
 SET GLOBAL innodb_file_format = `Barracuda`;
 SET GLOBAL innodb_file_per_table = ON;
@@ -88,15 +85,4 @@ SET GLOBAL innodb_encrypt_tables=ON;
 
 -- source include/start_mysqld.inc
 
-use test;
 drop database enctests;
-# reset system
-
---disable_query_log
---disable_warnings
-EVAL SET GLOBAL innodb_compression_algorithm = $innodb_compression_algorithm_orig;
-EVAL SET GLOBAL innodb_file_per_table = $innodb_file_per_table_orig;
-EVAL SET GLOBAL innodb_file_format = $innodb_file_format_orig;
-set global innodb_compression_algorithm = DEFAULT;
---enable_warnings
---enable_query_log