Update the list of files tidy ignores.

The deque file was removed in favour of an external crate.

The sync and sync_css directories are automatically created when updating the
in-tree copies of the wpt and css tests.

python/tidy.py

@@ -27,8 +27,6 @@
     os.path.join(".", "resources", "hsts_preload.json"),
     os.path.join(".", "tests", "wpt", "metadata", "MANIFEST.json"),
     os.path.join(".", "tests", "wpt", "metadata-css", "MANIFEST.json"),
-    # MIT license
-    os.path.join(".", "components", "util", "deque", "mod.rs"),
     # Hidden files
     os.path.join(".", "."),
 ]
@@ -41,6 +39,8 @@
     os.path.join(".", "tests", "wpt", "harness"),
     os.path.join(".", "tests", "wpt", "update"),
     os.path.join(".", "tests", "wpt", "web-platform-tests"),
+    os.path.join(".", "tests", "wpt", "sync"),
+    os.path.join(".", "tests", "wpt", "sync_css"),
     os.path.join(".", "python", "mach"),
     os.path.join(".", "components", "script", "dom", "bindings", "codegen", "parser"),
     os.path.join(".", "components", "script", "dom", "bindings", "codegen", "ply"),