Revert "Initialize rbenv"

This reverts commit f0ae8bf651a285bf5f8bc31ca4a0d07c45862485.

Yeeeah, I really prefer rvm for gemsets.

Conflicts:
	bashrc.symlink
Revert "Add rbenv shims to $PATH"

This reverts commit 54b65a8528425f1b89418e81589d3c1773c45097.

Conflicts:
	bashrc.symlink
Revert "No more rvm."

This reverts commit 9fe3375479b08028b324f921ce85b6619674cad6.

Conflicts:
	bashrc.symlink