Fix import_in_place typo in w3c_importer.py

This was introduced in r165968.

Also remove the shebang line to make the presubmit happy.

R=ojan@chromium.org
BUG=242329

Review URL: https://codereview.chromium.org/191773002

git-svn-id: svn://svn.chromium.org/blink/trunk@168859 bbb929c8-8fbe-4397-9dbb-9b2b20218538