f880285af2
After https://chromium-review.googlesource.com/c/412190/ we can remove all the GYP variables. The GN args are also not used during runhooks (only GYP_DEFINES had any effect), so they're also removed to avoid confusion. Only use_goma=True was left since the ios recipe module uses it to decide if Goma shall be started on the bots. Delete unused GN/GYP-specific JSON files for bots that are now removed. Finally, bump iOS version 10.0 and change simulator phones to iPhone 6s to match what Chromium uses (may help solving bugs.webrtc.org/4752) BUG=webrtc:4752, webrtc:6323 NOTRY=True Review-Url: https://codereview.webrtc.org/2507063008 Cr-Commit-Position: refs/heads/master@{#15160}