Revert #3747

[singingwolfboy]

#3747 caused LMS-11464, and since it didn't add any tests, it's too risky to go into the release.

[jzoldak]

@singingwolfboy @sarina FYI.

I looked into the acceptance.tests.test_lms.LanguageTest test failures.

What these tests are doing is changing the user's preferred language from the default English to Dummy Esperanto, then confirming that the title label for the section of the student dashboard that shows all the courses that the student is enrolled in now contains "ÇØÜRSÉS" rather than being "CURRENT COURSES". (Technical aside - actually the text is the lowercase version of that string, styling uppercases its display in the browser).

This title string is defined in lms/templates/dashboard.html as a translated string. PR #3747 changed it from "Current Courses" to "Courses". We need to be sure that both the string and the applied translation are kept in step, otherwise these tests will fail.