Revert "Updated README with additional video resources for learning Devise (#5232)"
Revert "Updated README with additional video resources for learning Devise (#5232)"

This reverts commit d85d45bcefdee5c9adde5cbd1273723abe35f5e2.

My mistake: this section is about *not* using Devise when starting with
Rails and building authentication for the first time, therefore we
should not be linking to Devise specific resources here.

[ci skip]

plataformatec/devise,plataformatec/devise,Qwiklabs/devise,Qwiklabs/devise