Remove unneeded translations from rel attribute options.

[Bakual]

Pull Request for discussion in PR #9282 .

Summary of Changes

Removes translation strings for the options in the new rel attribute parameter. Those aren't needed because we don't need to have those translated.

Testing Instructions

Make sure you can still see and can select each option.

[Bakual]

Original testing instructions apply here as well:

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This PR add the ability to set "rel" attribute of a link when you setup a menu item type of external url.
SEO purpose.

Testing Instructions

Before patch

Create a menu item type of "External url", go to tab "Link type", there is no way to setup an rel attribute.

After patch

• Create a menu item type of "External url", add title, link (eg: https://www.google.fr/) then go to tab "Link type", there is a field "Link Rel Attribute" to setup (eg: Nofollow);
• Save.
• Go to frontend, look at html rendered by a module menu (eg: ul > li > a)

this should seem like this:

<a href="https://www.google.fr/" rel="nofollow">My external url</a>

Try switching different rel value, for "None" there is no rel attribute:

<a href="https://www.google.fr/">My external url</a>

[infograf768]

I have tested this item ✅ successfully on 849fe43

ok here. should go in now. @wilsonge

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[infograf768]

can be merged on review

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_{This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/9300.}