Remove FLUSH PRIVILEGES from the GitHub Actions

Author: hiroyuki-sato

.github/workflows/check.yml

@@ -84,8 +84,6 @@ jobs:
       run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'root';"
     - name: Change password (root@%)
       run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'root';"
-    - name: FLUSH PRIVILEGES
-      run: mysql -h 127.0.0.1 --port 3306 -uroot -proot -e "FLUSH PRIVILEGES;"
     - name: Build with testing
       run: ./gradlew --stacktrace :embulk-output-mysql:check
       env: