Cherry-pick from https://github.com/chromium/chromium/commit/f5f6e361d037c31630661186e7bd7b31d2784cb8

--- a/src/3rdparty/chromium/mojo/public/tools/mojom/mojom/fileutil.py
+++ b/src/3rdparty/chromium/mojo/public/tools/mojom/mojom/fileutil.py
@@ -3,7 +3,6 @@
 # found in the LICENSE file.
 
 import errno
-import imp
 import os.path
 import sys
 
--- a/src/3rdparty/chromium/mojo/public/tools/mojom/mojom/parse/lexer.py
+++ b/src/3rdparty/chromium/mojo/public/tools/mojom/mojom/parse/lexer.py
@@ -2,7 +2,6 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import imp
 import os.path
 import sys