[5.4] Remove the useless INI Parser support

[muhme]

Steps to reproduce the issue

• Home Dashboard > Joomla Update > Options > Select Update Channel: Joomla Next

Expected result

There is no check step 'INI Parser Support' existing.

Actual result

There is a check step 'INI Parser Support' existing:

System information (as much as possible)

Joomla 5.4-dev

Additional comments

As discussed in joomla/Manual#546 there is no need to explicit test and document INI Parser Support availablity.