Remove use_system_ssl GYP flag

It's no longer supported. Packagers that wish to replace how Chromium
packages/uses NSS should add support via src/build/linux/unbundle

BUG=336511
R=phajdan.jr, brettw

Review URL: https://codereview.chromium.org/139743009

Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 516009142bfa85a27b5c50a700bd3fa1e02f8dc6
2 files changed
tree: 932f9bb935fe7430c97fd6dfde5a6bc0a75ac5f5
  1. tools/