Remove unused dtor from GrTextStrike

Change-Id: I65c95acba080cd4465f3343ab57beb19fcbb75f2
Reviewed-on: https://skia-review.googlesource.com/c/179381
Auto-Submit: Herb Derby <herb@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
3 files changed