chore: 빈 라인 제거

Author: ksundong

yoonexample/src/main/java/stack/OperatorPriority.java

@@ -30,6 +30,4 @@ public static OperatorPriority getOperatorPriority(char sign) {
   public int getPriority() {
     return priority;
   }
-
-
 }