Follow-up: Remove SSH key title input description

Problem to solve

The help text is adding unnecessary cognitive load.

Background for context

The following discussion from !57494 (merged) should be addressed:

• @mjang1 started a discussion: (+1 comment)

  I think this explanation is not required -- and in some cases can confuse users. IMO "Title" (and the placeholder) is more than enough.

  I therefore suggest:

        expect(rendered).to have_text('Give your individual key a title.')

  @mjang1 WDYT about keeping the description and changing it to something like This is to help you identify your key.? The reason is extremely minor and really not much of an concern, but without the description the form inputs spacing don't match. 🙈

Proposal

Remove the help text from the Title input field.