`pnpm add --config <pkg>` (via `resolveConfigDeps`) wrote the env lockfile without pruning, so optional subdependencies from the previously resolved version remained as orphans. Mirror the prune call from `resolveAndInstallConfigDeps`.
`pnpm add --config <pkg>` (via `resolveConfigDeps`) wrote the env lockfile without pruning, so optional subdependencies from the previously resolved version remained as orphans. Mirror the prune call from `resolveAndInstallConfigDeps`.