Code clean up

Author: plokhotnyuk

jsoniter-scala-core/js/src/main/scala/com/github/plokhotnyuk/jsoniter_scala/core/JsonWriter.scala

@@ -2041,7 +2041,9 @@ final class JsonWriter private[jsoniter_scala](
     val buf = this.buf
     val ds = digits
     buf(pos) = '"'
-    pos = writeYearMonth(x.getYear, x.getMonthValue, pos + 1, buf, ds)
+    pos = writeYear(x.getYear, pos + 1, buf, ds)
+    buf(pos) = '-'
+    pos = write2Digits(x.getMonthValue, pos + 1, buf, ds)
     buf(pos) = '"'
     count = pos + 1
   }
@@ -2096,12 +2098,6 @@ final class JsonWriter private[jsoniter_scala](
     write2Digits(x.getDayOfMonth, pos + 1, buf, ds)
   }
 
-  private[this] def writeYearMonth(year: Int, month: Int, p: Int, buf: Array[Byte], ds: Array[Short]): Int = {
-    val pos = writeYear(year, p, buf, ds)
-    buf(pos) = '-'
-    write2Digits(month, pos + 1, buf, ds)
-  }
-
   @inline
   private[this] def writeYear(year: Int, pos: Int, buf: Array[Byte], ds: Array[Short]): Int =
     if (year >= 0 && year < 10000) write4Digits(year, pos, buf, ds)