Really remove config.h

sky/engine/wtf/dtoa/strtod.cc

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-#include "sky/engine/config.h"
 
 #include <stdarg.h>
 #include <limits.h>
 
 #include "sky/engine/wtf/dtoa/strtod.h"
 #include "sky/engine/wtf/dtoa/bignum.h"
 #include "cached-powers.h"
 #include "sky/engine/wtf/dtoa/double.h"
 
 namespace WTF {
@@ skipping 399 matching lines @@
         if (DoubleStrtod(trimmed, exponent, &guess) ||
             DiyFpStrtod(trimmed, exponent, &guess)) {
             return guess;
         }
         return BignumStrtod(trimmed, exponent, guess);
     }
 
 }  // namespace double_conversion
 
 } // namespace WTF