Removes temporary guard against DISALLOW_IMPLICIT_CONSTRUCTORS in Blink.

Source/wtf/dtoa/utils.h

Index: Source/wtf/dtoa/utils.h
diff --git a/Source/wtf/dtoa/utils.h b/Source/wtf/dtoa/utils.h
index 335769102ee86fb7cacc25984ac857b82ad77d56..87a8062847210abf0a747c0a9c91da90edc825e4 100644
--- a/Source/wtf/dtoa/utils.h
+++ b/Source/wtf/dtoa/utils.h
@@ -104,11 +104,9 @@ void operator=(const TypeName&)
 // This should be used in the private: declarations for a class
 // that wants to prevent anyone from instantiating it. This is
 // especially useful for classes containing only static methods.
-#ifndef DISALLOW_IMPLICIT_CONSTRUCTORS
 #define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName) \
 TypeName() = delete;                             \
 DISALLOW_COPY_AND_ASSIGN(TypeName)
-#endif // DISALLOW_IMPLICIT_CONSTRUCTORS
 
 namespace WTF {