Remove unused variable

This variable has been useless since 2019-01-08.
We probably don't need to check for its usage anymore,
given how much time has passed since then, but ..

roles/matrix-nginx-proxy/defaults/main.yml

@@ -215,10 +215,6 @@ matrix_nginx_proxy_proxy_jitsi_additional_server_configuration_blocks: []
 # A list of strings containing additional configuration blocks to add to the base domain server configuration.
 matrix_nginx_proxy_proxy_domain_additional_server_configuration_blocks: []
 
-# Specifies when to reload the matrix-nginx-proxy service so that
-# a new SSL certificate could go into effect.
-matrix_nginx_proxy_reload_cron_time_definition: "20 4 */5 * *"
-
 # Specifies the SSL configuration that should be used for the SSL protocols and ciphers
 # This is based on the Mozilla Server Side TLS Recommended configurations.
 #

roles/matrix-nginx-proxy/tasks/validate_config.yml

@@ -12,6 +12,8 @@
     # People who configured this to disable Riot, would now wish to be disabling Element.
     # We now also have `matrix_nginx_proxy_proxy_riot_compat_redirect_`, but that's something else and is disabled by default.
     - {'old': 'matrix_nginx_proxy_proxy_riot_enabled', 'new': 'matrix_nginx_proxy_proxy_element_enabled'}
+    - {'old': 'matrix_ssl_lets_encrypt_renew_cron_time_definition', 'new': '<not configurable anymore>'}
+    - {'old': 'matrix_nginx_proxy_reload_cron_time_definition', 'new': '<not configurable anymore>'}
 
 - name: Fail on unknown matrix_ssl_retrieval_method
   fail: