undo SkMatrix() cast -- must be done by sksl machine

Change-Id: Iec6ac37117470237873ad02b6dd471a4bd216d97
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/264861
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Mike Reed <reed@google.com>
diff --git a/src/gpu/gradients/generated/GrLinearGradientLayout.cpp b/src/gpu/gradients/generated/GrLinearGradientLayout.cpp
index 2d5ae3a..b4da70d 100644
--- a/src/gpu/gradients/generated/GrLinearGradientLayout.cpp
+++ b/src/gpu/gradients/generated/GrLinearGradientLayout.cpp
@@ -85,5 +85,5 @@
         return nullptr;
     }
     matrix.postConcat(grad.getGradientMatrix());
-    return std::unique_ptr<GrFragmentProcessor>(new GrLinearGradientLayout(SkMatrix(matrix)));
+    return std::unique_ptr<GrFragmentProcessor>(new GrLinearGradientLayout(matrix));
 }