prefix unused vars

lib/philomena/images.ex

@@ -153,9 +153,9 @@ defmodule Philomena.Images do
     end
   end
 
-  defp maybe_approve_image(image, nil), do: false
+  defp maybe_approve_image(_image, nil), do: false
 
-  defp maybe_approve_image(image, %User{verified: false, role: role}) when role == "user",
+  defp maybe_approve_image(_image, %User{verified: false, role: role}) when role == "user",
     do: false
 
   defp maybe_approve_image(image, _user), do: approve_image(image)

lib/philomena_web/controllers/conversation/message/approve_controller.ex

@@ -14,7 +14,6 @@ defmodule PhilomenaWeb.Conversation.Message.ApproveController do
 
   def create(conn, _params) do
     message = conn.assigns.message
-    user = conn.assigns.current_user
 
     {:ok, _message} = Conversations.approve_conversation_message(message)
 
@@ -24,7 +23,7 @@ defmodule PhilomenaWeb.Conversation.Message.ApproveController do
     |> redirect(to: "/")
   end
 
-  defp log_details(conn, _action, message) do
+  defp log_details(_conn, _action, message) do
     %{
       body: "Approved private message in conversation ##{message.conversation_id}",
       subject_path: "/"

lib/philomena_web/controllers/topic/post/approve_controller.ex

@@ -38,7 +38,7 @@ defmodule PhilomenaWeb.Topic.Post.ApproveController do
     end
   end
 
-  defp log_details(conn, action, post) do
+  defp log_details(conn, _action, post) do
     %{
       body: "Approved forum post ##{post.id} in topic '#{post.topic.title}'",
       subject_path:

lib/philomena_web/markdown_renderer.ex

@@ -102,7 +102,7 @@ defmodule PhilomenaWeb.MarkdownRenderer do
                 )
                 |> safe_to_string()
 
-              [id, suffix] when not img.approved ->
+              [_id, suffix] when not img.approved ->
                 ">>#{img.id}#{suffix}#{link_suffix(img)}"
 
               [_id, ""] ->