Eliminate parallelism in npm package.json modifier

Author: steveluscher

.github/workflows/publish-prerelease-packages.yml

@@ -44,7 +44,7 @@ jobs:
         run: |
           pnpm changeset pre exit
           find packages/* -maxdepth 0 -type d -print0 | \
-            xargs -t0 -n 1 -P $(nproc) -I {} \
+            xargs -t0 -n 1 -I {} \
               sh -c 'cd {} && pnpm pkg delete devDependencies'
           pnpm changeset version --snapshot preview
           pnpm turbo publish-packages --concurrency=100% --filter=\!@solana/web3.js