Remove unneeded alias in import

[JakeFr]

Hello,

Fixers related to import do not remove unneeded alias.
If would be nice to have a fixer for this code

• before running PHP CS Fixer (no changes):

namespace Vendor\Package;

use OtherVendor\OtherPackage\BazClass as BazClass;

• with the changes you expected instead:

namespace Vendor\Package;

use OtherVendor\OtherPackage\BazClass;

And fix the other imports (trait, const and function)

WDYT?
Are there any code side effects?

[SpacePossum]

this is implemented in #6267 , closing as such