fix(nuxt): Remove setting @sentry/nuxt external

[s1gr1d]

This reverts commit 6e61f82.

Reverts this PR: #16407

@sentry/nuxt is not added as dependency in the node_modules of the build output after version 3.15.0 as mentioned here: #16422

fixes #16422

[Lms24]

Is there anything we need to do to fix the issue for which we opened #16407?

[s1gr1d]

I still need to dig a bit into this. I initially created the PR to externalize it because it was bundling in OTel and other dependencies (as written in the description of #16407).

However, this does not always happen and there is no reliable way to reproduce this. In case users stumble over the problem, they can manually externalize the needed dependencies like this:

// in nuxt.config.ts
nitro: {
    rollupConfig: {
      external: ['@sentry/nuxt'], // or ['@sentry/node', '@sentry/core']
    }
},