GAP! and PSEUDOGAP! entries

The Italian and Hebrew wordnets have many entries whose lemma is `GAP!` or `PSEUDOGAP!`:

```console
$ grep -rP --include 'wn-data*.tab' ':lemma\t(PSEUDO)?GAP!' | cut -f2,3 | sort | uniq -c
    328 heb:lemma	GAP!
      1 heb:lemma	PSEUDOGAP!
    969 ita:lemma	GAP!
     39 ita:lemma	PSEUDOGAP!

```

I think these can be removed entirely.