remove perspective SDF from subrun

SDF can never be perspective because of line 53 of
GrSDFTOptions.cpp. Just remove all the perspective code.

Change-Id: I7f08c05ab6f0ea2d885a8ebc6ca6f802ca9adc69
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/339718
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
1 file changed