Fix unused-variable warnings

Author: kevinbader

test/blacklist_test.exs

@@ -56,12 +56,12 @@ defmodule BlacklistTest do
       # Verify all connections but the last one have been dropped:
 
       assert {_event, sse} = SseClient.read_event(sse, "rig.session_killed")
-      assert {:closed, sse} = SseClient.status(sse)
+      assert {:closed, _sse} = SseClient.status(sse)
 
-      assert {:closed, ws} = WsClient.status(ws)
+      assert {:closed, _ws} = WsClient.status(ws)
 
       assert {:ok, other_sse} = SseClient.refute_receive(other_sse)
-      assert {:open, other_sse} = SseClient.status(other_sse)
+      assert {:open, _other_sse} = SseClient.status(other_sse)
     end
   end
 

test/event_subscription_test.exs

@@ -383,7 +383,7 @@ defmodule RigInboundGateway.EventSubscriptionTest do
 
         # After this, greetings to Alice are no longer forwarded:
         :ok = submit_event(greeting_for_alice())
-        assert {:ok, ref} = client.refute_receive(ref)
+        assert {:ok, _ref} = client.refute_receive(ref)
       end
     end
   end

test/rig_inbound_gateway/rig/proxy_test.exs

@@ -36,7 +36,7 @@ defmodule RigInboundGateway.ProxyTest do
            end) =~
              error
 
-    assert_received({:EXIT, proxy, :ReverseProxyConfigurationError})
+    assert_received({:EXIT, _proxy, :ReverseProxyConfigurationError})
   end
 
   describe "validations" do