fix: remove email check while sign up

name: Bug Report
about: Report a bug in the Corpus Collector Backend.
title: "[Bug]: "
labels: "bug"
assignees: ''

title: "fix(backend): "

🐛 Bug Report

Describe the bug

when a new volunteer is trying to signup then if his email is already registered with other account then the email check doesn't allow to signup with that particular email so we need to remove the email check in the sign up

To Reproduce

Steps to reproduce the behavior:

1. Go to 'signup'
2. Click on 'email' and give a registered email
3. Scroll down to 'signup'
4. See error

Expected behavior

The error message shows up because the email exists already with another account.

Environment

• OS: [e.g. iOS, Windows, Linux]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]