remove install of asset-pack

[gonpombo8]

@dcl/asset-packs is already installed inside the @dcl/inspector.
@dcl/inspector is installed via @dcl/sdk-commands
@dcl/sdk-commands is installed via @dcl/sdk

So there is no need to install the asset-packs again, is already there.
Also it fixes the unlink of npm packages every time you run npm start.

[cloudflare-workers-and-pages]

Deploying js-sdk-toolchain with    Cloudflare Pages

Latest commit:	6fd642b
Status:	✅  Deploy successful!
Preview URL:	https://a5d7352e.js-sdk-toolchain.pages.dev
Branch Preview URL:	https://remove-asset-pack.js-sdk-toolchain.pages.dev

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[github-actions]

Test this pull request

• The @dcl/sdk package can be tested in scenes by running

  npm install "https://sdk-team-cdn.decentraland.org/@dcl/js-sdk-toolchain/branch/remove/asset-pack/dcl-sdk-7.5.8-10727602469.commit-819eb1b.tgz"

• To test with npx init

  export SDK_COMMANDS="https://sdk-team-cdn.decentraland.org/@dcl/js-sdk-toolchain/branch/remove/asset-pack/dcl-sdk-commands-7.5.8-10727602469.commit-819eb1b.tgz"
  npx $SDK_COMMANDS init

• The @dcl/inspector package can be tested by visiting this url

  • Or by installing it via NPM

  npm install "https://sdk-team-cdn.decentraland.org/@dcl/js-sdk-toolchain/branch/remove/asset-pack/@dcl/inspector/dcl-inspector-7.5.8-10727602469.commit-819eb1b.tgz"

• The /changerealm command to test test in-world

  /changerealm https://sdk-team-cdn.decentraland.org/ipfs/remove/asset-pack-e2e
  

• You can preview this build entering:
  https://playground.decentraland.org/?sdk-branch=remove/asset-pack