SYSML2_ — P8 import textual notation may have errors

I suspect that there are two errors near the top of page 30 in the P8 namespace textual notation:
1. Import Annotations::*; should be import ApprovalMetadata::*;
import Annotations::* does not seem to serve a purpose here, and ApprovalMetadata elements would be needed to support the following code (when corrected).
2. import NA::*[@Approved]; should be import NA::*[@Approval and approved]; or import NA::*[@approved]; or another version of this depending on interpretation of preceding commentary.

Remove the declaration of example package P8

The package P8 is actually from an earlier version of the example and was intended to have been deleted previously.