4265 remove INTERNAL_RELEASE_BUILD

*** 419,436 ****
  The release date text to be used; e.g., October 2009. If not set in
  your environment file, then this text defaults to the output from
  $(LC_ALL=C date +"%B %Y"); e.g., "October 2009".
  .RE
  .LP
- .B INTERNAL_RELEASE_BUILD
- .RS 5
- See Makefile.master - but it mostly controls id strings. Generally,
- let
- .I nightly
- set this for you.
- .RE
- .LP
  .B RELEASE_BUILD
  .RS 5
  Define this to build a release with a non-DEBUG kernel. 
  Generally, let
  .I nightly
--- 419,428 ----