[turbofan] inline %StringIteratorPrototype%.next in JSBuiltinReducer.

src/code-stub-assembler.h

Index: src/code-stub-assembler.h
diff --git a/src/code-stub-assembler.h b/src/code-stub-assembler.h
index 15efe5904b04d6cbbae708327767271b1209a4e6..d72d48feabded69066b58a2588090d8e23fc3f48 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -19,12 +19,6 @@ class StubCache;
 
 enum class PrimitiveType { kBoolean, kNumber, kString, kSymbol };
 
-enum class UnicodeEncoding {
-  // Different unicode encodings in a |word32|:
-  UTF16,  // hi 16bits -> trailing surrogate or 0, low 16bits -> lead surrogate
-  UTF32,  // full UTF32 code unit / Unicode codepoint
-};
-
 // Provides JavaScript-specific "macro-assembler" functionality on top of the
 // CodeAssembler. By factoring the JavaScript-isms out of the CodeAssembler,
 // it's possible to add JavaScript-specific useful CodeAssembler "macros"