refactor: Updates 24hr reminder to remove MyMLH reference (#302)

* refactor: Updates 24hr reminder to remove MyMLH reference

* refactor: Improves verbiage of 24hr message

* Update db/seed_messages/user--24hr_incomplete_application.md

Co-authored-by: Peter Kos <pkos91@icloud.com>

Co-authored-by: Peter Kos <pkos91@icloud.com>

Author: cbaudouinjr

db/seed_messages/user--24hr_incomplete_application.md

@@ -1,10 +1,10 @@
 ## Finish Your Application
 
-You're almost there! You completed the My MLH part of the application, but didn't finish the additional {{hackathon_name}}-specific questions.
+You're almost there! You created an account, but didn't finish the additional {{hackathon_name}}-specific questions.
 
-<strong>Your application will not be considered until it is completed.</strong>
+<strong>You will not be considered until an application is completed.</strong>
 
-Not to worry! Just [head on back to the website]({{apply_url}}), sign in with your existing My MLH account (if necessary), and complete the application.
+Not to worry! Just [head on back to the website]({{apply_url}}), sign in with your existing account, and complete the application.
 
 <a href="{{apply_url}}" class="button">Finish Application »</a>