Remove all_components GN target.
Remove all_components GN target.

This is not necessary for any build step, and the utility of being able to compile "all components" is pretty low. Typically one would compile components_unittests. Also, nothing is ensuring that this list is up-to-date.

If one really wanted to compile all components, it would be better to use "gn ls" and compile the resulting targets. This result can't go out-of-date.

Review URL: https://codereview.chromium.org/1491453004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#362519}

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