mautrix-telegram: refactor and move top pkgs/by-name, stop recursing into it

it is a derivation, why were we recursing into it?

pkgs/by-name/ma/mautrix-telegram/package.nix

@@ -23,14 +23,14 @@ let
     };
   };
 in
-python.pkgs.buildPythonPackage rec {
+python.pkgs.buildPythonPackage (finalAttrs: {
   pname = "mautrix-telegram";
   version = "0.15.3";
 
   src = fetchFromGitHub {
     owner = "mautrix";
     repo = "telegram";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-w3BqWyAJV/lZPoOFDzxhootpw451lYruwM9efwS6cEc=";
   };
 
@@ -90,4 +90,4 @@ python.pkgs.buildPythonPackage rec {
     ];
     mainProgram = "mautrix-telegram";
   };
-}
+})

pkgs/top-level/all-packages.nix

@@ -2766,8 +2766,6 @@ with pkgs;
 
   maubot = with python3Packages; toPythonApplication maubot;
 
-  mautrix-telegram = recurseIntoAttrs (callPackage ../servers/mautrix-telegram { });
-
   m2r = with python3Packages; toPythonApplication m2r;
 
   md2gemini = with python3.pkgs; toPythonApplication md2gemini;