Remove unused dependencies

[philknows]

Example: node-gyp is listed in our package.json and is no longer used. We will use this issue to track completion and identify any unused dependencies to also get rid of.

Related to https://github.com/ChainSafe/lodestar/issues/6026

Dependencies to remove:

• node-gyp

[Sandijigs]

Hello @philknows , I would like to work on this issue