Refactor: Simplify CityObjectCollector

CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/check/CheckId.java

@@ -56,7 +56,6 @@ public record CheckId(String name) implements Serializable {
 	public static final CheckId C_GE_S_NOT_CLOSED = new CheckId("C_GE_S_NOT_CLOSED");
 	public static final CheckId C_GE_P_ORIENTATION_RINGS_SAME = new CheckId("C_GE_P_ORIENTATION_RINGS_SAME");
 	public static final CheckId C_SE_POLYGON_WITHOUT_SURFACE = new CheckId("C_SE_POLYGON_WITHOUT_SURFACE");
-	public static final CheckId UTIL_CITY_OBJECT_COLLECTOR = new CheckId("UTIL_CITY_OBJECT_COLLECTOR");
 
 	@Override
 	public boolean equals(Object obj) {

CityDoctorParent/CityDoctorValidation/src/main/java/de/hft/stuttgart/citydoctor2/checks/util/CityObjectCollector.java

 package de.hft.stuttgart.citydoctor2.checks.util;
 
-import de.hft.stuttgart.citydoctor2.check.Check;
-import de.hft.stuttgart.citydoctor2.check.CheckId;
-import de.hft.stuttgart.citydoctor2.check.Requirement;
-import de.hft.stuttgart.citydoctor2.check.RequirementType;
+import de.hft.stuttgart.citydoctor2.check.AbstractCheck;
 import de.hft.stuttgart.citydoctor2.datastructure.CityObject;
 
 import java.util.HashSet;
 import java.util.Set;
 
-public class CityObjectCollector extends Check {
+public class CityObjectCollector extends AbstractCheck {
 
     private final Set<CityObject> objects = new HashSet<>();
 
-    @Override
-    public Set<Requirement> appliesToRequirements() {
-        return Set.of();
-    }
-
-    @Override
-    public CheckId getCheckId() {
-        return CheckId.UTIL_CITY_OBJECT_COLLECTOR;
-    }
-
-    @Override
-    public RequirementType getType() {
-        return null;
-    }
-
-    @Override
-    public Check createNewInstance() {
-        return new CityObjectCollector();
-    }
-
-    @Override
-    public boolean isValidator() {
-        return false;
-    }
-
     public Set<CityObject> getCityObjects() {
         return objects;
     }