Cleanup of code that converts from GPU-backed resources to SkImageInfo

src/gpu/GrSurface.cpp

Index: src/gpu/GrSurface.cpp
diff --git a/src/gpu/GrSurface.cpp b/src/gpu/GrSurface.cpp
index 47fa394788645434ce133e5ac0df8e54c9682330..6dc90a3d1aea07b0353601b9a5eb6f2977f66096 100644
--- a/src/gpu/GrSurface.cpp
+++ b/src/gpu/GrSurface.cpp
@@ -116,15 +116,6 @@ bool GrSurface::readPixels(int left, int top, int width, int height,
                                       rowBytes, pixelOpsFlags);
 }
 
-SkImageInfo GrSurface::info(SkAlphaType alphaType) const {
-    SkColorType colorType;
-    sk_sp<SkColorSpace> colorSpace;
-    if (!GrPixelConfigToColorAndColorSpace(this->config(), &colorType, &colorSpace)) {
-        sk_throw();
-    }
-    return SkImageInfo::Make(this->width(), this->height(), colorType, alphaType, colorSpace);
-}
-
 // TODO: This should probably be a non-member helper function. It might only be needed in
 // debug or developer builds.
 bool GrSurface::savePixels(const char* filename) {