tests: Remove dhparam volume

No longer necessary for the majority of tests.

test/test_debug/test_proxy-debug-flag.yml

@@ -22,6 +22,5 @@ sut:
   image: nginxproxy/nginx-proxy:test
   volumes:
     - /var/run/docker.sock:/tmp/docker.sock:ro
-    - ../lib/ssl/dhparam.pem:/etc/nginx/dhparam/dhparam.pem:ro
   environment:
     DEBUG: "true"

test/test_debug/test_server-debug-flag.yml

@@ -23,4 +23,3 @@ sut:
   image: nginxproxy/nginx-proxy:test
   volumes:
     - /var/run/docker.sock:/tmp/docker.sock:ro
-    - ../lib/ssl/dhparam.pem:/etc/nginx/dhparam/dhparam.pem:ro