Remove isConfigCopyable from GrCaps.

Bug: skia:6718
Change-Id: I1ad95f838c9d41e5c22811efab5845217880907f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/230894
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/src/gpu/SkGr.cpp b/src/gpu/SkGr.cpp
index bb8d19b..09a93a2 100644
--- a/src/gpu/SkGr.cpp
+++ b/src/gpu/SkGr.cpp
@@ -127,7 +127,7 @@
                                                      GrTextureProxy* baseProxy) {
     SkASSERT(baseProxy);
 
-    if (!ctx->priv().caps()->isConfigCopyable(baseProxy->config())) {
+    if (!ctx->priv().caps()->isFormatCopyable(baseProxy->backendFormat())) {
         return nullptr;
     }
     return GrSurfaceProxy::Copy(ctx, baseProxy, GrMipMapped::kYes, SkBackingFit::kExact,