Revert "adb: check our socketpair ends in our win32 emulation."

This reverts commit 5990191c.

Some Windows users are seeing mismatches between the two ends.

Bug: https://code.google.com/p/android/issues/detail?id=258400
Test: mma
Change-Id: Ie3a121a2754332608ff64b3b016adcb4258d41f3