diff --git a/moz.build b/moz.build
deleted file mode 100644
index 510da4870b7..00000000000
--- a/moz.build
+++ /dev/null
@@ -1,26 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-with Files("**"):
-    BUG_COMPONENT = ("Firefox", "General")
-
-with Files("components/style/**"):
-    BUG_COMPONENT = ("Core", "CSS Parsing and Computation")
-
-with Files("components/style_derive/**"):
-    BUG_COMPONENT = ("Core", "CSS Parsing and Computation")
-
-with Files("components/style_traits/**"):
-    BUG_COMPONENT = ("Core", "CSS Parsing and Computation")
-
-with Files("components/selectors/**"):
-    BUG_COMPONENT = ("Core", "CSS Parsing and Computation")
-
-with Files("ports/geckolib/**"):
-    BUG_COMPONENT = ("Core", "CSS Parsing and Computation")
-
-with Files("tests/unit/style/**"):
-    BUG_COMPONENT = ("Core", "CSS Parsing and Computation")