Revert "Changes to iterators.pyx for new StringStore scheme"
Revert "Changes to iterators.pyx for new StringStore scheme"

This reverts commit 4f794b215a8c3ec8103fd949d2e8048edac31dd9.

explosion/spaCy,recognai/spaCy,oroszgy/spaCy.hu,explosion/spaCy,oroszgy/spaCy.hu,recognai/spaCy,recognai/spaCy,spacy-io/spaCy,raphael0202/spaCy,honnibal/spaCy,aikramer2/spaCy,Gregory-Howard/spaCy,aikramer2/spaCy,raphael0202/spaCy,banglakit/spaCy,raphael0202/spaCy,explosion/spaCy,explosion/spaCy,spacy-io/spaCy,raphael0202/spaCy,aikramer2/spaCy,Gregory-Howard/spaCy,spacy-io/spaCy,recognai/spaCy,explosion/spaCy,explosion/spaCy,banglakit/spaCy,raphael0202/spaCy,banglakit/spaCy,honnibal/spaCy,Gregory-Howard/spaCy,Gregory-Howard/spaCy,Gregory-Howard/spaCy,spacy-io/spaCy,honnibal/spaCy,spacy-io/spaCy,oroszgy/spaCy.hu,banglakit/spaCy,recognai/spaCy,banglakit/spaCy,honnibal/spaCy,oroszgy/spaCy.hu,oroszgy/spaCy.hu,aikramer2/spaCy,aikramer2/spaCy,spacy-io/spaCy,banglakit/spaCy,oroszgy/spaCy.hu,aikramer2/spaCy,raphael0202/spaCy,recognai/spaCy,Gregory-Howard/spaCy