Update Firebase.js

Rusty with js. Removing semicolon

src/services/Firebase.js

@@ -16,7 +16,7 @@ const config = {
 class Firebase {
   constructor() {
     /* Short circuit if no API Key provided */
-    if(!process.env.REACT_APP_API_KEY)      return;
+    if(!process.env.REACT_APP_API_KEY)      return
     app.initializeApp(config)
 
     this.auth = app.auth()