title: Angular - Do We Need A Constructor If It Doesn't Have Any Logic
body: <p>I'm working with angular.</p>
  <p>I'm wondering about whether constructors are needed, and would appreciate some insight.
  In several classes, I have constructor that are empty most of the time my service classes have empty constructors. Can these empty constructors be removed? Are there any negative impact to a class have no constructor vs having an empty one?</p>