SONARJAVA-6269 S1451: Rollback to empty default headerFormat (#5588)

Author: NoemieBenard

java-checks/src/main/java/org/sonar/java/checks/FileHeaderCheck.java

@@ -31,13 +31,7 @@
 @Rule(key = "S1451")
 public class FileHeaderCheck extends IssuableSubscriptionVisitor {
 
-  private static final String DEFAULT_HEADER_FORMAT = """
-    /*
-     * <Your-Product-Name>
-     * Copyright (c) <Year-From>-<Year-To> <Your-Company-Name>
-     *
-     * Please configure this header in your SonarCloud/SonarQube quality profile.
-     */""";
+  private static final String DEFAULT_HEADER_FORMAT = "";
   private static final String MESSAGE = "Add or update the header of this file.";
 
   @RuleProperty(

java-checks/src/test/java/org/sonar/java/checks/FileHeaderCheckTest.java

@@ -100,14 +100,12 @@ void test() {
       .verifyNoIssues();
 
     check = new FileHeaderCheck();
-    check.headerFormat = "";
     CheckVerifier.newVerifier()
       .onFile(mainCodeSourcesPath("checks/FileHeaderCheck/ClassBlankLine.java"))
       .withCheck(check)
       .verifyNoIssues();
 
     check = new FileHeaderCheck();
-    check.headerFormat = "";
     CheckVerifier.newVerifier()
       .onFile(mainCodeSourcesPath("checks/FileHeaderCheck/ClassNoBlankLine.java"))
       .withCheck(check)