Revert of fix misc asserts and checks found by fuzzer (patchset #1 id:1 of https://codereview.chromium.org/1719913002/ )

Reason for revert:
Looks to be causing failures in LayerTreeHostFilters* tests (https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_ng/builds/177297/steps/cc_unittests%20%28with%20patch%29/logs/stdio).

Original issue's description:
> fix misc asserts and checks found by fuzzer
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1713383002
>
> TBR=
>
> Committed: https://skia.googlesource.com/skia/+/653db51b440491b0fb1908bf5a43dcc89c90044d

TBR=reed@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1721743002

1 files changed, 1 insertions, 8 deletions

diff --git a/src/effects/SkAlphaThresholdFilter.cpp b/src/effects/SkAlphaThresholdFilter.cpp
index 406797084f..79520602b7 100644
--- a/src/effects/SkAlphaThresholdFilter.cpp
+++ b/src/effects/SkAlphaThresholdFilter.cpp
@@ -45,19 +45,11 @@ SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkAlphaThresholdFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkAlphaThresholdFilterImpl)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END
 
-static bool outside_unit(SkScalar x) {
-    return x < 0 || x > 1;
-}
 
 SkImageFilter* SkAlphaThresholdFilter::Create(const SkRegion& region,
                                               SkScalar innerThreshold,
                                               SkScalar outerThreshold,
                                               SkImageFilter* input) {
-    if (outside_unit(innerThreshold) || outside_unit(outerThreshold) ||
-        innerThreshold > outerThreshold)
-    {
-        return nullptr;
-    }
     return new SkAlphaThresholdFilterImpl(region, innerThreshold, outerThreshold, input);
 }
 
@@ -342,6 +334,7 @@ void SkAlphaThresholdFilterImpl::flatten(SkWriteBuffer& buffer) const {
 bool SkAlphaThresholdFilterImpl::onFilterImageDeprecated(Proxy* proxy, const SkBitmap& src,
                                                          const Context& ctx, SkBitmap* dst,
                                                          SkIPoint* offset) const {
+    SkASSERT(src.colorType() == kN32_SkColorType);
 
     if (src.colorType() != kN32_SkColorType) {
         return false;