fix(tazjin/emacs): Temporary fixes to use unstable telega

The latest Emacs versions removed some (private) functions that telega
depends on, and this is fixed in HEAD of telega.el.

However, without these fixes, the unstable version of telega doesn't
build because the patch Nix tries to apply doesn't match the source
anymore.

The patch itself doesn't seem to do anything relevant for me.

Change-Id: Ib9a042c636cb438b2b15d231a07afd5c02be72ee
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3294
Reviewed-by: tazjin <mail@tazj.in>
Tested-by: BuildkiteCI

third_party/emacs/telega.nix

@@ -0,0 +1,6 @@
+# Temporary fix for unstable telega that tries to build with a broken patch.
+{ pkgs, ... }:
+
+pkgs.emacsPackages.melpaPackages.telega.overrideAttrs(old: {
+  patches = [];
+})

users/tazjin/emacs/default.nix

@@ -14,7 +14,7 @@ let
   emacsWithPackages = (pkgs.emacsPackagesGen emacs).emacsWithPackages;
 
   # $PATH for binaries that need to be available to Emacs
-  emacsBinPath = lib.makeBinPath [ pkgs.emacsPackages.telega ];
+  emacsBinPath = lib.makeBinPath [ pkgs.emacsPackages.tvlPackages.telega ];
 
   identity = x: x;
 
@@ -110,6 +110,7 @@ let
 
     # patched / overridden versions of packages
     rcirc
+    telega
   ]))));
 in lib.fix(self: l: f: pkgs.writeShellScriptBin "tazjins-emacs" ''
   export PATH="${emacsBinPath}:$PATH"