plugins/telescope/extensions: use mkExtension's dependencies parameter

plugins/by-name/telescope/extensions/manix.nix

@@ -23,6 +23,8 @@ mkExtension {
     })
   ];
 
+  dependencies = [ "manix" ];
+
   settingsOptions = {
     manix_args = defaultNullOpts.mkListOf lib.types.str [ ] "CLI arguments to pass to manix.";
 
@@ -34,8 +36,4 @@ mkExtension {
   settingsExample = {
     cword = true;
   };
-
-  extraConfig = {
-    dependencies.manix.enable = lib.mkDefault true;
-  };
 }

plugins/by-name/telescope/extensions/media-files.nix

@@ -58,11 +58,7 @@ mkExtension {
       }
     ];
 
-  extraConfig = cfg: {
-    dependencies = {
-      chafa.enable = lib.mkDefault true;
-    };
-  };
+  dependencies = [ "chafa" ];
 
   settingsOptions = {
     filetypes = defaultNullOpts.mkListOf types.str [