Revert "Added pyenv-virtualenv plugin"

plugins/available/pyenv.plugin.bash

@@ -1,10 +1,14 @@
 cite about-plugin
 about-plugin 'load pyenv, if you are using it'
 
-export PYENV_PATH=`which pyenv`
-export PATH="$PYENV_PATH:$PATH"
-
+export PYENV_ROOT="$HOME/.pyenv"
+export PATH="$PYENV_ROOT/bin:$PATH"
 [[ `which pyenv` ]] && eval "$(pyenv init -)"
 
+#Load pyenv virtualenv if the virtualenv plugin is installed.
+if pyenv virtualenv-init - &> /dev/null; then
+  eval "$(pyenv virtualenv-init -)"
+fi
+
 # Load the auto-completion script if pyenv was loaded.
 [[ -e $PYENV_ROOT/completions/pyenv.bash ]] && source $PYENV_ROOT/completions/pyenv.bash