Bug 1494316 - Remove gn generated json files for win64; r=dmajor

These are identical to the 32 bit versions and so are no longer necessary to correctly generate moz.build files for windows. Depends on D7101 Differential Revision: https://phabricator.services.mozilla.com/D7102 --HG-- extra : moz-landing-system : lando
2018-09-27 17:41:31 +00:00 · 2018-09-27 17:41:31 +00:00 · ac1afbc0db
--- a/media/webrtc/gn-configs/x64_False_x64_win.json
+++ b/media/webrtc/gn-configs/x64_False_x64_win.json
--- a/media/webrtc/gn-configs/x64_True_x64_win.json
+++ b/media/webrtc/gn-configs/x64_True_x64_win.json