Remove unused generateTextureProxyForParams

Change-Id: Ia599d8db0072b1f3629e05c5bd6bb6e7492cad28
Reviewed-on: https://skia-review.googlesource.com/138937
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2 files changed