Fix new credo warnings

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/graphql/resolvers/media.ex

@@ -15,7 +15,7 @@ defmodule Mobilizon.GraphQL.Resolvers.Media do
   See Mobilizon.Web.Resolvers.Event.create_event/3
   """
   def media(%{picture_id: media_id} = _parent, _args, _resolution) do
-    with {:ok, media} <- do_fetch_media(media_id), do: {:ok, media}
+    do_fetch_media(media_id)
   end
 
   def media(%{picture: media} = _parent, _args, _resolution), do: {:ok, media}

lib/graphql/resolvers/user.ex

@@ -559,11 +559,9 @@ defmodule Mobilizon.GraphQL.Resolvers.User do
            Enum.each(actors, fn actor ->
              actor_performing = Keyword.get(options, :actor_performing, actor)
              Actions.Delete.delete(actor, actor_performing, true)
-           end),
-         # Delete user
-         {:ok, user} <-
-           Users.delete_user(user, reserve_email: Keyword.get(options, :reserve_email, activated)) do
-      {:ok, user}
+           end) do
+      # Delete user
+      Users.delete_user(user, reserve_email: Keyword.get(options, :reserve_email, activated))
     end
   end