Improvement node.d.ts typings
Merge pull request #1947 from borisyankov/fix-node.d.ts

Improvement node.d.ts typings
Revert "Merge pull request #1931 from yortus/node-express-referenceable-types"

This reverts commit 0bfcda81b494a9f123325b198d202a850cfc88d0, reversing
changes made to 2c52e529f9694028e02445c4fe046eda732acd49.
fixed realpathsync again