chore: [gn] remove gclient hook for node config.gypi (#13354)

DEPS

@@ -45,17 +45,6 @@ hooks = [
     'name':
       'electron_external_binaries'
   },
-  {
-    'action': [
-      'bash',
-      '-c',
-      # NOTE(nornagon): this ridiculous {{}} stuff is because these strings get
-      # variable-substituted twice by gclient.
-      'echo -e "#\\n{{{{\'variables\':{{{{}}}}}}}}" > src/third_party/electron_node/config.gypi',
-    ],
-    'pattern': 'src/third_party/electron_node',
-    'name': 'touch_node_config_gypi'
-  },
   {
     'action': [
       'bash',