Revert "docs: Add notes on OS X application menu."

This reverts commit 4509056d5e7698732bb25aff8bdeb963a8fbf040.
Revert "Start a TCP server in the debugger thread."

This reverts commit 20f21b707bae737dcc1e3bc6ba9fd2a57bf2437d.

Conflicts:
	atom/browser/node_debugger.cc
	atom/browser/node_debugger.h