Remove PyUp from readme
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<i>An awesome project for an awesome event PyCon</i>
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- <a class="badge-align" href="https://pyup.io/repos/github/pythonitalia/pycon/"><img src="https://pyup.io/repos/github/pythonitalia/pycon/shield.svg" alt="Python 3" /></a>
- <a class="badge-align" href="https://pyup.io/repos/github/pythonitalia/pycon/"><img src="https://pyup.io/repos/github/pythonitalia/pycon/shield.svg" alt="Updates" /></a>
<a class="badge-align" href="https://www.codacy.com/app/pythonitalia/pycon?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=pythonitalia/pycon&amp;utm_campaign=Badge_Grade"><img src="https://api.codacy.com/project/badge/Grade/b0f6b7573fab4dbbb49d8b1ee0f510f4"/></a>
<a class="badge-align" href="https://www.codacy.com/app/pythonitalia/pycon?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=pythonitalia/pycon&amp;utm_campaign=Badge_Coverage"><img src="https://api.codacy.com/project/badge/Coverage/b0f6b7573fab4dbbb49d8b1ee0f510f4"/></a>
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