move #include out of header

Not important, just puzzled me when reading it.
A little IWYU.

Change-Id: I3199e6a4c34794f07bddda31032dfa871ce9bc4f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/294021
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
diff --git a/src/core/SkRasterPipeline.cpp b/src/core/SkRasterPipeline.cpp
index 2a4fbd0..f1bce40 100644
--- a/src/core/SkRasterPipeline.cpp
+++ b/src/core/SkRasterPipeline.cpp
@@ -6,6 +6,7 @@
  */
 
 #include "include/private/SkImageInfoPriv.h"
+#include "include/private/SkNx.h"
 #include "src/core/SkColorSpacePriv.h"
 #include "src/core/SkOpts.h"
 #include "src/core/SkRasterPipeline.h"
diff --git a/src/core/SkRasterPipeline.h b/src/core/SkRasterPipeline.h
index 04d677b..4ec07de 100644
--- a/src/core/SkRasterPipeline.h
+++ b/src/core/SkRasterPipeline.h
@@ -14,7 +14,6 @@
 #include "include/core/SkRefCnt.h"
 #include "include/core/SkTileMode.h"
 #include "include/core/SkTypes.h"
-#include "include/private/SkNx.h"
 #include "include/private/SkTArray.h"
 #include "src/core/SkArenaAlloc.h"
 #include <functional>