Remove X-Frame-Options from DocuSign request

[luizrrodrigues]

Reference: topcoder-platform/micro-frontends-challenges-app#18

[sandhiyakavi]

Verified in Dev Env.

NDA Terms:

bandicam.2021-10-06.18-08-08-898.mp4

Standard Terms:

bandicam.2021-10-06.18-05-36-818.mp4