fix: mysql-client has no installation candidate

php-fpm/Dockerfile

@@ -810,11 +810,7 @@ USER root
 ARG INSTALL_MYSQL_CLIENT=false
 
 RUN if [ ${INSTALL_MYSQL_CLIENT} = true ]; then \
-    if [ ${LARADOCK_PHP_VERSION} = "7.3" ]; then \
       apt-get -y install default-mysql-client \
-    ;else \
-      apt-get -y install mysql-client \
-    ;fi \
 ;fi
 
 ###########################################################################

php-worker/Dockerfile

@@ -96,11 +96,7 @@ RUN set -eux; \
 # Install MySQL Client:
 ARG INSTALL_MYSQL_CLIENT=false
 RUN if [ ${INSTALL_MYSQL_CLIENT} = true ]; then \
-    if [ ${LARADOCK_PHP_VERSION} = "7.3" ]; then \
       apk --update add default-mysql-client \
-    ;else \
-      apk --update add mysql-client \
-    ;fi \
 ;fi
 
 # Install FFMPEG: