[skif] Remove SkImageFilters::Image factory that did not take SkSamplingOptions

Change-Id: Ic2229a1043a129d77b9f2e08daf6dc205df3ae3a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/704918
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
28 files changed