fix: Revert "fix(toggles): Add help text to toggles"

What does this MR do?

Reverts feature MR that adds help text to the toggle component. The feature was introduced on this MR !1433 (merged). We are reverting these changes because there are features in GitLab that depends on properties that were removed in !1433 (merged). For more information, see gitlab!34555 (merged)

Does this MR meet the acceptance criteria?

Conformity

• Code review guidelines.
• GitLab UI's contributing guidlines.
• If it changes a Pajamas-compliant component's look & feel, the MR has been reviewed by a UX designer.
• If it changes GitLab UI's documentation guidelines, the MR has been reviewed by a Technical Writer.
• If the MR changes a component's API, integration MR(s) have been opened in the following projects to ensure that the @gitlab/ui package can be upgraded quickly after the changes are released:
  • GitLab: mr_url
  • Customers Portal: mr_url
  • Status Page: mr_url
• Added the ~"component:*" label(s) if applicable.