remove Documentation/highuid.txt

A nearly 8 years old status and TODO list for the change to 32-bit UIDs doesn't have much value.

---

 Documentation/00-INDEX    |    2 
 Documentation/highuid.txt |   79 --------------------------------------
 2 files changed, 81 deletions(-)

75431baf33dfc60d0e005fc09be529b6dacd595c

index 6b09461..9e94065 100644
@@ -160,8 +160,6 @@ gpio.txt
 	- overview of GPIO (General Purpose Input/Output) access conventions.
 hayes-esp.txt
 	- info on using the Hayes ESP serial driver.
-highuid.txt
-	- notes on the change from 16 bit to 32 bit user/group IDs.
 hpet.txt
 	- High Precision Event Timer Driver for Linux.
 hrtimer/

NAK this one - the highuid stuff is pretty much a summary of current status and the information provided is mostly still relevant.