Delete 2 legacy flags

src/core/SkBitmapController.cpp

Index: src/core/SkBitmapController.cpp
diff --git a/src/core/SkBitmapController.cpp b/src/core/SkBitmapController.cpp
index 5430575515d38bda1f849fcd049df57234c8a21d..f4d352507aa616dba7012a677dfce95ad0cad52d 100644
--- a/src/core/SkBitmapController.cpp
+++ b/src/core/SkBitmapController.cpp
@@ -161,13 +161,9 @@ bool SkDefaultBitmapControllerState::processMediumRequest(const SkBitmapProvider
         return false;
     }
 
-#ifdef SK_SUPPORT_LEGACY_ANISOTROPIC_MIPMAPS
-    SkScalar invScale = SkScalarSqrt(invScaleSize.width() * invScaleSize.height());
-#else
     // Use the largest (non-inverse) scale, to ensure anisotropic consistency.
     SkASSERT(invScaleSize.width() >= 0 && invScaleSize.height() >= 0);
     const SkScalar invScale = SkTMin(invScaleSize.width(), invScaleSize.height());
-#endif
 
     if (invScale > SK_Scalar1) {
         fCurrMip.reset(SkMipMapCache::FindAndRef(provider.makeCacheDesc()));