simplify scale2

Author: wenshao

src/java.base/share/classes/java/math/BigDecimal.java

@@ -4334,10 +4334,9 @@ private String layoutCharsE(boolean sci, String coeff, int coeffLen, long adjust
 
     private static String scale2(int intCompact) {
         int highInt = intCompact / 100;
-        int lowInt = intCompact - highInt * 100;
         int highIntSize = DecimalDigits.stringSize(highInt);
         byte[] buf = new byte[highIntSize + 3];
-        DecimalDigits.putPairLatin1(buf, highIntSize + 1, lowInt);
+        DecimalDigits.putPairLatin1(buf, highIntSize + 1, intCompact - highInt * 100);
         buf[highIntSize] = '.';
         DecimalDigits.getCharsLatin1(highInt, highIntSize, buf);
         return newStringNoRepl(buf);