Welp, switching to offlineimap means I don't need this

This reverts commit 03a630d9a4.
This reverts commit 54bec4ac8e.

common/mu.patch

@@ -1,15 +0,0 @@
-diff --git a/lib/mu-store.cc b/lib/mu-store.cc
-index c67b551c..59eb183c 100644
---- a/lib/mu-store.cc
-+++ b/lib/mu-store.cc
-@@ -582,7 +582,7 @@ Store::move_message(Store::Id id,
- 		const auto dup_flags{filter_dup_flags(dup_msg->flags(), *new_flags)};
- 		/* use the updated new_flags and MoveOptions without DupFlags (so we don't
- 		 * recurse) */
--		opts = opts & ~MoveOptions::DupFlags;
-+		opts = opts & ~MoveOptions::DupFlags & ~MoveOptions::ChangeName;
- 		if (auto dup_res = priv_->move_message_unlocked(
- 			    std::move(*dup_msg), Nothing, dup_flags, opts); !dup_res)
- 			mu_warning("failed to move dup: {}", dup_res.error().what());
---
-2.51.2

common/overlays.nix

@@ -13,23 +13,13 @@ inputs: system:
     });
   })
 
-  (final: prev: {
-    mu = prev.mu.overrideAttrs (old: {
-      patches = (old.patches or []) ++ [
-        ./mu.patch
-      ];
-    });
-  })
-
   (final: prev: {
     # final.emacs-git, final.emacs-unstable, or final.emacs-igc
     myEmacs =
       ((prev.emacsPackagesFor final.emacs-unstable)
         .emacsWithPackages (epkgs: with epkgs; [
           treesit-grammars.with-all-grammars
-          (mu4e.override {
-            mu = final.mu;
-          })
+          mu4e
         ]));
   })