Remove obsolete comments in pkg-config-wrapper
Remove obsolete comments in pkg-config-wrapper

The related code was removed in
https://codereview.chromium.org/1580643002.

BUG=none

Review-Url: https://codereview.chromium.org/1934243002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#391022}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk