refactor: remove code smell java:S5786 (#2159)

https://sonarcloud.io/organizations/iluwatar/rules?open=java%3AS5786&rule_key=java%3AS5786

acyclic-visitor/src/test/java/com/iluwatar/acyclicvisitor/ConfigureForDosVisitorTest.java

@@ -74,7 +74,7 @@ class ConfigureForDosVisitorTest {
 
   @BeforeEach
   @AfterEach
-  public void clearLoggers() {
+  void clearLoggers() {
     TestLoggerFactory.clear();
   }
 }

acyclic-visitor/src/test/java/com/iluwatar/acyclicvisitor/ConfigureForUnixVisitorTest.java

@@ -44,7 +44,7 @@ class ConfigureForUnixVisitorTest {
 
   @BeforeEach
   @AfterEach
-  public void clearLoggers() {
+  void clearLoggers() {
     TestLoggerFactory.clear();
   }