Cleanup after removal of IORefs from GrSurface

The removal of IORefs from GrSurface makes a lot of other cruft obsolete.

Change-Id: I0e02d680a17dc4f4ec705cb6ee4c294738271e28
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/239919
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/GrOnFlushResourceProvider.cpp b/src/gpu/GrOnFlushResourceProvider.cpp
index bb63505..781df12 100644
--- a/src/gpu/GrOnFlushResourceProvider.cpp
+++ b/src/gpu/GrOnFlushResourceProvider.cpp
@@ -20,8 +20,7 @@
         sk_sp<GrSurfaceProxy> proxy, GrColorType colorType, sk_sp<SkColorSpace> colorSpace,
         const SkSurfaceProps* props) {
     // Since this is at flush time and these won't be allocated for us by the GrResourceAllocator
-    // we have to manually ensure it is allocated here. The proxy had best have been created
-    // with the kNoPendingIO flag!
+    // we have to manually ensure it is allocated here.
     if (!this->instatiateProxy(proxy.get())) {
         return nullptr;
     }