[Posts] Fix the iqdb remove job

More faraday fallout. For delete requests, it expects this parameter to be iterable (if present)

app/logical/iqdb_proxy.rb

@@ -15,9 +15,9 @@ module IqdbProxy
     endpoint.present?
   end
 
-  def make_request(path, request_type, params = {})
+  def make_request(path, request_type, body = nil)
     conn = Faraday.new(Danbooru.config.faraday_options)
-    conn.send(request_type, endpoint + path, params.to_json, { content_type: "application/json" })
+    conn.send(request_type, endpoint + path, body&.to_json, { content_type: "application/json" })
   rescue Faraday::Error
     raise Error, "This service is temporarily unavailable. Please try again later."
   end

test/unit/post_test.rb

@@ -64,8 +64,9 @@ class PostTest < ActiveSupport::TestCase
       end
 
       should "remove the post from iqdb" do
-        @post.expects(:remove_iqdb_async).once
-        @post.expunge!
+        request_stub = stub_request(:delete, "#{IqdbProxy.endpoint}/images/#{@post.id}")
+        with_inline_jobs { @post.expunge! }
+        assert_requested request_stub
       end
 
       context "that is status locked" do