chore(deps) - remove unused dependencies

[Antreesy]

☑️ Resolves

• Remove unused dependencies from project:

Package name	Added since	Unused since
color.js	#4985	#6798
url-parse	#2891	#9915
vue-resize	#3739	#4985
extendable-media-recorder-wav-encoder-worker	#5903	shipped with extendable-media-recorder-wav-encoder
workbox-webpack-plugin	#5903	never used
terser-webpack-plugin	#5903	never used
webpack-node-externals	#2185	never used

🚧 Tasks

• Manual testing (tested on prod build with web client + Chrome + Linux)

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not required
• 📘 API documentation in docs/ has been updated or is not required
• 📗 User documentation in https://github.com/nextcloud/documentation/tree/master/user_manual/talk has been updated or is not required
• 🔖 Capability is added or not needed

[ShGKme]

Some details:

• webpack-node-externals is not used and usually useful only on nodejs backend development
• terser-webpack-plugin is used by @nextcloud/webpack-vue-config, but it can be safely removed as this is a direct dependency of Webpack (which is peer of @nextcloud/webpack-vue-config anyway)
• workbox-webpack-plugin is for Service Workers what we do not use

Also tested, that it works in general, including audio messages from files sidebar and calls.

[Antreesy]

/backport to stable27

[backportbot-nextcloud]

The backport to stable27 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable27
git pull origin stable27

# Create the new backport branch
git checkout -b fix/foo-stable27

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts. Resolve them.
git cherry-pick abc123

# Push the cherry pick commit to the remote repository and open a pull request
git push origin fix/foo-stable27

More info at https://docs.nextcloud.com/server/latest/developer_manual/getting_started/development_process.html#manual-backport