remove deprecated brew line

modules/darwin/homebrew.nix

@@ -34,7 +34,6 @@
       };
       global = {
         brewfile = true; # Run brew bundle from anywhere
-        lockfiles = false; # Don't save lockfile (since running from anywhere)
       };
       brews = [
         "trash" # Delete files and folders to trash instead of rm

platforms/nix-darwin/modules/nmasur/presets/programs/homebrew.nix

@@ -33,7 +33,6 @@ in
       };
       global = {
         brewfile = true; # Run brew bundle from anywhere
-        lockfiles = false; # Don't save lockfile (since running from anywhere)
       };
     };