Remove std::move()s from returns of std::unique_ptrs

Change-Id: I50f9c56f05514c6cb3e013ef8f8b2ae3873f2645

Cq-Include-Trybots: skia.primary:Test-Chromecast-Clang-Chorizo-CPU-Cortex_A7-arm-Debug-All
Change-Id: I50f9c56f05514c6cb3e013ef8f8b2ae3873f2645
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/235100
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
diff --git a/src/utils/SkCanvasStateUtils.cpp b/src/utils/SkCanvasStateUtils.cpp
index a4a9d43..53d0244 100644
--- a/src/utils/SkCanvasStateUtils.cpp
+++ b/src/utils/SkCanvasStateUtils.cpp
@@ -304,7 +304,7 @@
                                                                   state_v1->layers[i].y));
     }
 
-    return std::move(canvas);
+    return canvas;
 }
 
 ////////////////////////////////////////////////////////////////////////////////