fix: removed set details from employee class

Author: Meiko-S22

lesson_15/tdd/tdd_app/src/main/java/com/codedifferently/lesson15/Employee.java

@@ -57,10 +57,5 @@ public String getDetails() {
         + salary;
   }
 
-  public void setDetails(int id, String name, String department, double salary) {
-    this.id = id;
-    this.name = name;
-    this.department = department;
-    this.salary = salary;
-  }
+
 }