Do not specify now-unnecessary worker_main_http_uri Synapse worker setting

Related to

- c15e9a0edb
- 01a0527892

roles/custom/matrix-synapse/templates/synapse/worker.yaml.j2

@@ -10,10 +10,6 @@ worker_replication_host: matrix-synapse
 worker_replication_http_port: {{ matrix_synapse_replication_http_port }}
 {% endif %}
 
-{% if matrix_synapse_worker_details.type == 'generic_worker' %}
-worker_main_http_uri: http://matrix-synapse:{{ matrix_synapse_container_client_api_port }}
-{% endif %}
-
 {% set http_resources = [] %}
 
 {% if matrix_synapse_worker_details.type == 'user_dir' %}