Remove SK_LEGACY_IMAGE_FILTER_CROP_RECT_EDGES code.
Remove SK_LEGACY_IMAGE_FILTER_CROP_RECT_EDGES code.

This is no longer used in Chrome.

BUG=skia:4089

Review URL: https://codereview.chromium.org/1245193002

tmpvar/skia.cc,nvoron23/skia,shahrzadmn/skia,noselhq/skia,nvoron23/skia,google/skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,shahrzadmn/skia,shahrzadmn/skia,google/skia,ominux/skia,HalCanary/skia-hc,qrealka/skia-hc,todotodoo/skia,ominux/skia,noselhq/skia,qrealka/skia-hc,HalCanary/skia-hc,todotodoo/skia,qrealka/skia-hc,shahrzadmn/skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,nvoron23/skia,vanish87/skia,rubenvb/skia,tmpvar/skia.cc,nvoron23/skia,google/skia,google/skia,todotodoo/skia,todotodoo/skia,aosp-mirror/platform_external_skia,vanish87/skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,vanish87/skia,todotodoo/skia,rubenvb/skia,Hikari-no-Tenshi/android_external_skia,google/skia,nvoron23/skia,google/skia,shahrzadmn/skia,Hikari-no-Tenshi/android_external_skia,rubenvb/skia,ominux/skia,tmpvar/skia.cc,qrealka/skia-hc,ominux/skia,shahrzadmn/skia,HalCanary/skia-hc,ominux/skia,qrealka/skia-hc,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,todotodoo/skia,shahrzadmn/skia,noselhq/skia,HalCanary/skia-hc,shahrzadmn/skia,qrealka/skia-hc,qrealka/skia-hc,tmpvar/skia.cc,ominux/skia,tmpvar/skia.cc,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,vanish87/skia,vanish87/skia,todotodoo/skia,google/skia,rubenvb/skia,aosp-mirror/platform_external_skia,vanish87/skia,ominux/skia,vanish87/skia,noselhq/skia,HalCanary/skia-hc,tmpvar/skia.cc,ominux/skia,noselhq/skia,Hikari-no-Tenshi/android_external_skia,tmpvar/skia.cc,google/skia,todotodoo/skia,nvoron23/skia,HalCanary/skia-hc,rubenvb/skia,todotodoo/skia,aosp-mirror/platform_external_skia,rubenvb/skia,tmpvar/skia.cc,shahrzadmn/skia,Hikari-no-Tenshi/android_external_skia,rubenvb/skia,rubenvb/skia,nvoron23/skia,HalCanary/skia-hc,ominux/skia,Hikari-no-Tenshi/android_external_skia,noselhq/skia,nvoron23/skia,vanish87/skia,noselhq/skia,HalCanary/skia-hc,noselhq/skia,tmpvar/skia.cc,vanish87/skia,rubenvb/skia,qrealka/skia-hc,nvoron23/skia,noselhq/skia,rubenvb/skia