When editing metadata in ArcGIS Pro the Manage Mapping tab shows a variety of tools for working with the metadata. There appears to be no way of simply removing all metadata or resetting it to blank values appropriate for the source format for a selected item in the catalog.
It would be very useful to have a button in the Metadata group on the ribbon that is clear all metadata.
I'm aware of some basic metadata data manipulation using arcpy but if your dataset has inherited geoprocessing logs these are difficult to remove when you have hundreds of entries.
I've seen old threads pertaining to ArcMap and using the Import Metadata tool with a blank path as a way of overwriting the metadata with nothing (an acceptable solution) but the importMetadata() functions simply throws an error for ArcGIS Pro.