Warning fixes 2

• Fixed Manage Users also got rid of filter feature for manage users because of relational database having the constraint of ssoId, username to be unique.
• Created an api service and changed api functionality to take in the object rather than a specific parameter for getting, and deleting.
• Got rid of process.env.REMIX flag.
• Replaced mocks on tests, and fixed pipelines, featureBoards, and repos mocks.
• Removed previous api service code.
• nock is temporarily broken, but will be fixed as soon as the rest of the code is done migrating to the new API.