Delete compose image filter header

Bug: skia:11230
Change-Id: Ifa677319a04379dc36ff155590ba85d45790567e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/368596
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
6 files changed