README.rst: remove link to 1.0rc

Closes #339.

README.rst

@@ -32,11 +32,7 @@ Post feedback and issues on the `bug tracker`_, `mailing list`_, blog_ and `twit
 installing from github
 ----------------------
 
-To install latest release candidate:
-
-  pip install cython git+git://github.com/surfly/gevent.git@1.0rc3#egg=gevent
-
-To install latest development version:
+To install the latest development version:
 
   pip install cython git+git://github.com/surfly/gevent.git#egg=gevent