Style bikeshed - remove extraneous whitespace

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1842753002

Review URL: https://codereview.chromium.org/1842753002
diff --git a/src/pdf/SkPDFGraphicState.h b/src/pdf/SkPDFGraphicState.h
index 31848e8..06f1e11 100644
--- a/src/pdf/SkPDFGraphicState.h
+++ b/src/pdf/SkPDFGraphicState.h
@@ -1,4 +1,3 @@
-
 /*
  * Copyright 2010 The Android Open Source Project
  *
@@ -23,7 +22,7 @@
     once, we want to canonicalize them.
 */
 class SkPDFGraphicState final : public SkPDFObject {
-    
+
 public:
     enum SkPDFSMaskMode {
         kAlpha_SMaskMode,