When an employee is deleted from the database there shifts are deleted locally now.

SchedulerApp/src/main/java/com/example/schedulerapp/ReceiveThread.java

@@ -62,8 +62,15 @@ public class ReceiveThread extends Thread {
     }
 
     private void removeEmployee(String employeeID) {
+        int intID = -1;
         try {
-            this.client.employees.remove(Integer.parseInt(employeeID));
+            intID = Integer.parseInt(employeeID);
+            this.client.employees.remove(intID);
+            for (Shift shift : this.client.shifts.values()) {
+                if (shift.getEmployeeID() == intID) {
+                    this.client.shifts.remove(shift.getShiftID());
+                }
+            }
         } catch (Exception exception) {
             exception.printStackTrace();
         }