Fix Dialyzer warnings

lib/mix/tasks/pleroma/emoji.ex

@@ -186,11 +186,7 @@ defmodule Mix.Tasks.Pleroma.Emoji do
 
     tmp_pack_dir = Path.join(System.tmp_dir!(), "emoji-pack-#{name}")
 
-    {:ok, _} =
-      :zip.unzip(
-        binary_archive,
-        cwd: tmp_pack_dir
-      )
+    {:ok, _} = :zip.unzip(binary_archive, cwd: String.to_charlist(tmp_pack_dir))
 
     emoji_map = Pleroma.Emoji.Loader.make_shortcode_to_file_map(tmp_pack_dir, exts)
 

lib/mix/tasks/pleroma/user.ex

@@ -100,8 +100,7 @@ defmodule Mix.Tasks.Pleroma.User do
       User.perform(:delete, user)
       shell_info("User #{nickname} deleted.")
     else
-      _ ->
-        shell_error("No local user #{nickname}")
+      _ -> shell_error("No local user #{nickname}")
     end
   end