Remove obsolete "link_pool" code from GN's ninja writer.

The default "link_pool" was removed when code was refactored to use
explicit pool, but this code was forgotten. It is now dead, removing.

BUG=612786

Review-Url: https://codereview.chromium.org/2240673003
Cr-Original-Commit-Position: refs/heads/master@{#411735}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 7d1c95f62081964bdfbce57f05ec226918a2d940
1 file changed
tree: 4d49a34636fc1e00c36170f7e303bacb91a1319d
  1. tools/