roles/php-fpm: Remove "packages" tag

This tag is no longer reachable after switching to the new dynamic
includes in Ansible 2.4 and 2.5. Anyways, I've been questioning my
decision to add the "packages" tag to any task that uses the apt
module.

roles/php-fpm/tasks/Ubuntu.yml

@@ -12,7 +12,6 @@
       # for Piwik
       - php7.0-mbstring
       - php7.0-xml
-    tags: packages
 
   # only copy php-fpm config for vhosts that need WordPress or PHP
   - name: Copy php-fpm pool config

roles/php-fpm/tasks/Ubuntu_18.04.yml

@@ -12,7 +12,6 @@
       # for Piwik
       - php-mbstring
       - php-xml
-    tags: packages
 
   # only copy php-fpm config for vhosts that need WordPress or PHP
   - name: Copy php-fpm pool config