Bugfix: Remove main-thread location services check for single-shot location fetches

[fhasse95]

This PR removes the CLLocationManager.locationServicesEnabled() check introduced in #23 for single-shot location fetches because calling it on the main thread triggers a runtime warning: "This method can cause UI unresponsiveness if invoked on the main thread".

Removing this check also aligns the single-shot location fetching behavior with Android, where no equivalent check is performed before fetching a location.

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[marcprux]

Looks good! Feel free to merge and tag a new patch release.