Removal of email option for the curation script

[jonas-atmire]

References

• Fixes PR related issue

Description

This PR will remove the "email/-e" option from the curate script on Angular's end. See linked PR for REST related info.

Instructions for Reviewers

In the CurationFormComponent:

• All authentication related code is removed
  • authService and it's related calls are removed
  • The -e option is not added to the call anymore

In the related test component

• -e option is not added anymore
• unused code is cleaned up

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[tdonohue]

👍 Code changes look good. Tested with DSpace/DSpace#2926 and it works as expected now! Thanks @jonas-atmire