pfPorts/sqlite3: Remove the port, was unmodified on our side.

sqlite3 has only been found listed in the package 'imspector' I don't
think it's worth keeping this port on our side when it's getting
maintained upstream. Reconsider adding it once it needs a fixed version
or local modification.
Merge pull request #109 from matsimon/sqlite3-removal

pfPorts/sqlite3: Remove the port, was unmodified on our side.