Remove gzip support from synapse-reverse-proxy-companion

gzipping certain responses is known to cause problems with QR code logins.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3749

Gzipping at the synapse-reverse-proxy-companion level and not at the
level of the outer-most reverse-proxy (Traefik) also sounds non-ideal.

This change only affects setups powered by Synapse workers.

Non-worker setups (and setups powered by other homeservers) were not
having their requests go through synapse-reverse-proxy-companion anyway,
so this change does not affect them.

Future patches may enable response compression support at the Traefik level for
all setups.

roles/custom/matrix-synapse-reverse-proxy-companion/templates/nginx/conf.d/matrix-synapse-reverse-proxy-companion.conf.j2

@@ -91,9 +91,6 @@ server {
 	server_tokens off;
 	root /dev/null;
 
-	gzip on;
-	gzip_types text/plain application/json;
-
 	{% if matrix_synapse_reverse_proxy_companion_synapse_workers_enabled %}
 		# Client-server overrides -- These locations must go to the main Synapse process
 		location ~ {{ matrix_synapse_reverse_proxy_companion_client_server_main_override_locations_regex }} {
@@ -252,9 +249,6 @@ server {
 
 	root /dev/null;
 
-	gzip on;
-	gzip_types text/plain application/json;
-
 	{% if matrix_synapse_reverse_proxy_companion_synapse_workers_enabled %}
 		# Federation overrides -- These locations must go to the main Synapse process
 		location ~ {{ matrix_synapse_reverse_proxy_companion_federation_override_locations_regex }} {

roles/custom/matrix-synapse-reverse-proxy-companion/templates/nginx/nginx.conf.j2

@@ -66,7 +66,6 @@ http {
 
 	server_tokens off;
 
-	#gzip on;
 	{# Map directive needed for proxied WebSocket upgrades #}
 	map $http_upgrade $connection_upgrade {
 		default upgrade;