Revert "flake: pin mu to 1.6.11"

This reverts commit 58cc97b44f.

Doom now supports mu 1.8 !

flake.lock

@@ -88,22 +88,6 @@
         "type": "github"
       }
     },
-    "nixpkgs-mu-1-6-11": {
-      "locked": {
-        "lastModified": 1656166034,
-        "narHash": "sha256-r3v8um8KLJVm1XFGmovKeEBUtdoSTOWP+qKJztIbERQ=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "0100c5e564462ca83aed241c58a3427783737a26",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "0100c5e564462ca83aed241c58a3427783737a26",
-        "type": "github"
-      }
-    },
     "nixpkgs-unstable-small": {
       "locked": {
         "lastModified": 1657784809,
@@ -143,7 +127,6 @@
         "home-manager": "home-manager",
         "nixos-hardware": "nixos-hardware",
         "nixpkgs": "nixpkgs_2",
-        "nixpkgs-mu-1-6-11": "nixpkgs-mu-1-6-11",
         "nixpkgs-unstable-small": "nixpkgs-unstable-small"
       }
     },

flake.nix

@@ -8,13 +8,6 @@
       ref = "nixos-unstable";
     };
 
-    nixpkgs-mu-1-6-11 = {
-      type = "github";
-      owner = "NixOS";
-      repo = "nixpkgs";
-      rev = "0100c5e564462ca83aed241c58a3427783737a26";
-    };
-
     nixpkgs-unstable-small = {
       type = "github";
       owner = "NixOS";
@@ -81,7 +74,6 @@
           [
             (self: super: {
               packages = import ./pkgs {pkgs = super;};
-              mu = (import inputs.nixpkgs-mu-1-6-11 {inherit system;}).mu;
 
               # packages accessible through pkgs.unstable.package
               unstable = import inputs.nixpkgs-unstable-small {