Remove unnecessary test files/directories

[Eduardo06sp]

Reason for change: When I was looking through the tests recently, I found entire directories that had no tests at all. Presumably, they were automatically created from Rails's generators.

This makes it a lot easier to browse through the folders contained within the test directory.

Summary of changes:

• Removed directories/files with empty tests

  • channels/application_cable
  • helpers
  • mailers
  • models

• Refactored very small test for a :successful response for successes index within test/controllers/successes_controller_test.rb

  • Moved test to test/integration/successes_page_test.rb:.rb:13
  • Then deleted the entire controllers test folder, since the rest were empty

[kasugaijin]

Yes this is a good housekeeping! These are all generator generated.