(ios) removing hard coded height

[MoemenMostafa]

Platforms affected

iOS

Motivation and Context

The hard coded height is causing a problem in phones with notch when this plugin used without the statusbar plugin.
#301

Description

Testing

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[NiklasMerz]

We already have similar attempts for the status bar on devices with a notch: #546

But we want to remove this "fake statusbar" altogether soon #604

[NiklasMerz]

The statusbar has been removed in #656