remove identity of BreakActivity

jsprit-core/src/main/java/com/graphhopper/jsprit/core/problem/solution/route/activity/BreakActivity.java

@@ -94,38 +94,7 @@ public class BreakActivity extends AbstractActivity implements TourActivity.JobA
         this.latest = breakActivity.getTheoreticalLatestOperationStartTime();
         this.duration = breakActivity.getOperationTime();
     }
-
+    
-
-    /* (non-Javadoc)
-     * @see java.lang.Object#hashCode()
-     */
-    @Override
-    public int hashCode() {
-        final int prime = 31;
-        int result = 1;
-        result = prime * result + ((aBreak == null) ? 0 : aBreak.hashCode());
-        return result;
-    }
-
-    /* (non-Javadoc)
-     * @see java.lang.Object#equals(java.lang.Object)
-     */
-    @Override
-    public boolean equals(Object obj) {
-        if (this == obj)
-            return true;
-        if (obj == null)
-            return false;
-        if (getClass() != obj.getClass())
-            return false;
-        BreakActivity other = (BreakActivity) obj;
-        if (aBreak == null) {
-            if (other.aBreak != null)
-                return false;
-        } else if (!aBreak.equals(other.aBreak))
-            return false;
-        return true;
-    }
 
     public double getTheoreticalEarliestOperationStartTime() {
         return earliest;