Entries in purge table (1)

How do I delete a function in namespace .z?

The usual way to delete a function - any entity, for that matter, is

delete entity from namespace

e.g.

delete foo from `.

However, .z is a special namespace, so delete doesn't work:

q).z.ts: {47}
q)delete ts from `.z
'type
q)

There is a special command just for removing elements from .z:

q)\x .z.pi

See \x (expunge).