Remove accidentally repeated bit-index expression.

Also, remove unused #include of SkBitSet.

Change-Id: Ib1b903f78e835a75c8ba88ac35bfa270df7bc0e3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/322681
Commit-Queue: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>

Author: johnstiles-google

src/utils/SkBitSet.h

@@ -132,7 +132,7 @@ class SkBitSet {
                 if (bitIndex >= fSize) {
                     break;
                 }
-                return OptionalIndex(i * kChunkBits + SkCTZ(chunk));
+                return OptionalIndex(bitIndex);
             }
         }
         return OptionalIndex();

tests/PDFGlyphsToUnicodeTest.cpp

@@ -13,7 +13,6 @@
 #include "include/core/SkStream.h"
 #include "include/private/SkTo.h"
 #include "src/pdf/SkPDFMakeToUnicodeCmap.h"
-#include "src/utils/SkBitSet.h"
 
 static constexpr SkGlyphID kMaximumGlyphIndex = UINT16_MAX;