improved and simpler tox.ini for pytest-xdist desting

tox.ini

@@ -1,8 +1,6 @@
 [tox]
-distshare={homedir}/.tox/distshare
 envlist=py26,py31,py27,py25,py24
 [tox:hudson]
-distshare={toxworkdir}/distshare
 sdistsrc={distshare}/pytest-xdist-*
 
 [testenv]
@@ -12,24 +10,8 @@ deps=
 commands=
     py.test -rsfxX --tools-on-path \
             --junitxml={envlogdir}/junit-{envname}.xml []
-[testenv:py27]
-basepython=python2.7
 [testenv:py26]
 basepython=python2.6
 deps=
     {distshare}/py-*
     pexpect
-#[testenv:py26-py132]
-#basepython=python2.6
-#deps= py==1.3.2
-#      execnet==1.0.6
-[testenv:py25]
-basepython=python2.5
-[testenv:py24]
-basepython=python2.4
-[testenv:py31]
-basepython=python3.1
-#[testenv:pypy]
-#basepython=pypy-c
-[testenv:jython]
-basepython=jython