remove nixos armv7l unofficial binary cache

not-os-patches/pr-28.patch

@@ -1,5 +1,5 @@
 diff --git a/base.nix b/base.nix
-index 7eaee32..3ade454 100644
+index 7eaee32..9aa338e 100644
 --- a/base.nix
 +++ b/base.nix
 @@ -27,6 +27,11 @@ with lib;
@@ -14,7 +14,7 @@ index 7eaee32..3ade454 100644
      not-os.simpleStaticIp = mkOption {
        type = types.bool;
        default = false;
-@@ -84,17 +89,27 @@ with lib;
+@@ -84,17 +89,25 @@ with lib;
      };
      environment.etc = {
        "nix/nix.conf".source = pkgs.runCommand "nix.conf" {} ''
@@ -31,8 +31,6 @@ index 7eaee32..3ade454 100644
 +        extra-sandbox-paths = /bin/sh=${pkgs.runtimeShell} $(echo $extraPaths)
 +        max-jobs = auto
 +        sandbox = true
-+        substituters = https://cache.armv7l.xyz
-+        trusted-public-keys = cache.armv7l.xyz-1:kBY/eGnBAYiqYfg0fy0inWhshUo+pGFM3Pj7kIkmlBk=
 +        trusted-users = root
          EOF
        '';