Remove unneeded installation instructions.

Lib/idlelib/INSTALL.txt

-IDLEfork Installation Notes
-===========================
-
-IDLEfork requires Python Version 2.2 or later.
-
-There are several distribution files (where xx is the subversion):
-
-IDLEfork-0.9xx.win32-py2.2.exe
-IDLEfork-0.9xx.win32-py2.3.exe
-	
-        These are Windows installers which will install IDLEfork in
-	..../site-packages/idleforklib/ and place the idefork startup script at
-	..../scripts/idlefork.  Rename this script to idlefork.pyw and point
-	your launcher icons at it.  Installation is as idlefork to avoid
-	conflict with the original Python IDLE.  Choose the installer
-	appropriate for your version of Python.
-
-IDLEfork-0.9xx.tar.gz
-	This is a distutils sdist (source) tarfile which can be used to make 
-	installations on non-Windows platforms, or on Windows if a custom
-	installation is desired.  It installs as idlefork and will not
-	conflict with Python IDLE.
-
-	Unpack in ..../Tools/, cd to the IDLEfork directory created, and
-	"python setup.py install" to install in ....site-packages/idleforklib.
-
-IDLE-0.9xx.tar.gz
-	This is also a distutils sdist (source) tarfile.
-	
-	** It remains configured to install as idlelib, not idleforklib. **
-
-	First, remove your existing ..../site-packages/idlelib directory.
-
-	Unpack in ..../Tools/, cd to the IDLE directory (note the caps)
-	created, and "python setup.py install" to install in
-	....site-packages/idlelib.  This will replace the Python IDLE
-	installation.
-
-        If you don't want to overwrite Python IDLE, I'd recommend using the
-	IDLEfork release mentioned above.  However, it is also possible to
-	simply build IDLE without installing it: "python setup.py build" and
-	then copy the interrupt.so library out of the build directory into the
-	IDLE directory where IDLE can find it,
-
-	In this case, IDLE will not be on your PATH unless you are in the
-	source directory.  Either append your PATH or use a fully qualified
-	path to access IDLE, something like
-
-	python  /usr/bin/python/Tools/IDLE/idle.py 
-
-	That way you can continue to use the original IDLE at
-	..../Tools/idle/idle.py if you like.   (note lower case)
-
-	Using this approach, it's possible to have many different versions
-	of IDLE on your system at the same time, for comparison/test.
-
-
-	On Redhat Linux systems prior to 8.0, /usr/bin/python may be pointing
-	at python1.5.  If so, change the first line in the /usr/bin/idle 
-	script to read:
-
-	       !# /usr/bin/python2.2
-
-
-	An RPM has not been released since with addition of the interrupt
-	extension it is no longer platform/architecture independent.  The
-	distutils make it easy to build and install from the .tar.gz
-	distribution.  Certainly it's just as easy as installing the rpm.
-
-
-	On Mac OS X, /usr/bin/python may be pointing at the OS-installed
-	python, which does not have GUI support. Change the first line of
-	/usr/bin/idle to read:
-
-		#! /usr/bin/env pythonw
-
-	Also, to build an IDLE application that can be used from the Finder
-	on Mac OS X, run:
-
-		pythonw buildapp.py build
-		open build
-
-	You will see an IDLE application.
-
-	       
-See README.txt and NEWS.txt for more details on this version of IDLEfork. 
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