Revert of Parametric contour start GM (patchset #1 id:1 of https://codereview.chromium.org/1457503002/ )
Revert of Parametric contour start GM (patchset #1 id:1 of https://codereview.chromium.org/1457503002/ )

Reason for revert:
Breaks unit test across various platforms:

../../../src/gpu/batches/GrStencilAndCoverPathRenderer.cpp:75: failed assertion "path->isEqualTo(skPath, stroke)"

Original issue's description:
> Parametric contour start GM
>
> A GM to capture the newly added SkPath API.
>
> BUG=chromium:315277
> R=caryclark@google.com,reed@google.com
>
> Committed: https://skia.googlesource.com/skia/+/56847a65648af4d06da9c26c55242949a1bf31ab

TBR=caryclark@google.com,reed@google.com,fmalita@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:315277

Review URL: https://codereview.chromium.org/1456973002

HalCanary/skia-hc,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,rubenvb/skia,HalCanary/skia-hc,tmpvar/skia.cc,HalCanary/skia-hc,HalCanary/skia-hc,HalCanary/skia-hc,tmpvar/skia.cc,qrealka/skia-hc,tmpvar/skia.cc,Hikari-no-Tenshi/android_external_skia,rubenvb/skia,HalCanary/skia-hc,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,qrealka/skia-hc,rubenvb/skia,aosp-mirror/platform_external_skia,google/skia,google/skia,tmpvar/skia.cc,aosp-mirror/platform_external_skia,google/skia,google/skia,tmpvar/skia.cc,Hikari-no-Tenshi/android_external_skia,tmpvar/skia.cc,Hikari-no-Tenshi/android_external_skia,google/skia,qrealka/skia-hc,aosp-mirror/platform_external_skia,tmpvar/skia.cc,rubenvb/skia,qrealka/skia-hc,rubenvb/skia,rubenvb/skia,google/skia,google/skia,rubenvb/skia,rubenvb/skia,HalCanary/skia-hc,rubenvb/skia,google/skia,tmpvar/skia.cc,HalCanary/skia-hc,aosp-mirror/platform_external_skia,qrealka/skia-hc,HalCanary/skia-hc,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,rubenvb/skia,tmpvar/skia.cc,qrealka/skia-hc,qrealka/skia-hc,google/skia,google/skia,qrealka/skia-hc,Hikari-no-Tenshi/android_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia