Remove duplicate pkg manager field from `package.json`

[shivarm]

Check the following references:

nodejs.org/package.json

Line 62 in 61cd932

"packageManager": {

And here

nodejs.org/package.json

Line 55 in 61cd932

"packageManager": "pnpm@11.9.0",

[bjohansebas]

We shouldn't remove it. In the future, we'd expect all package managers to respect devEngines, if they don't already.

[shivarm]

I found this pnpm/pnpm#10932 for our case, I think we can remove packageManager extra field because pnpm respect devEngines

[ljharb]

Indeed, the root packageManager field is nonstandard and should be removed. devEngines is the way.