remove legacy fontmgr flag from flutter

Bug: skia:
Change-Id: I82d16b398ea8bb7309378f475d94d9dea0b263d5
Reviewed-on: https://skia-review.googlesource.com/56160
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed