chore: remove unsafe eval code from bundle

[0xmad]

Explanation

Remove unsafe eval code which comes from snarkjs > ejs.

More Information

Related to discussions in #116

Screenshots/Screencaps

N/A

Manual Testing Steps

Should load/generate proofs as expected without CSP errors

Pre-Merge Checklist

• PR template is filled out
• IF this PR fixes a bug, a test that would have caught the bug has been added
• PR is linked to the appropriate GitHub issue
• PR has been added to the appropriate release Milestone

+ If there are functional changes:

• Manual testing complete & passed
• "Extension QA Board" label has been applied

PR template source from github.com/MetaMask

[0xisk]

All looks good to me, just some small points left then we can good to go for approval.
Also, regarding ejs we can uninstall @zk-kit/protocols from the package.json, since it depends also on snarks and we dont need it anyway.

[0xisk]

Thanks so much @0xmad