Fix a bunch of unused variable warnings

test/support/builders/activity_builder.ex

@@ -26,7 +26,7 @@ defmodule Pleroma.Builders.ActivityBuilder do
   end
 
   def insert_list(times, data \\ %{}, opts \\ %{}) do
-    Enum.map(1..times, fn n ->
+    Enum.map(1..times, fn _n ->
       {:ok, activity} = insert(data, opts)
       activity
     end)

test/support/httpoison_mock.ex

@@ -367,7 +367,7 @@ defmodule HTTPoisonMock do
 
   def post(
         "https://social.heldscal.la/main/push/hub",
-        {:form, data},
+        {:form, _data},
         "Content-type": "application/x-www-form-urlencoded"
       ) do
     {:ok,
@@ -711,11 +711,11 @@ defmodule HTTPoisonMock do
      }"}
   end
 
-  def post(url, body, headers) do
+  def post(url, _body, _headers) do
     {:error, "Not implemented the mock response for post #{inspect(url)}"}
   end
 
-  def post(url, body, headers, options) do
+  def post(url, _body, _headers, _options) do
     {:error, "Not implemented the mock response for post #{inspect(url)}"}
   end
 end