Cleaning up my .bash_profile: Can I delete some of this?
The .bash_profile.macports-saved... are not actually executed, they're just backups. You can remove them if you don't need them.

.bash_history contains the last commands you executed on the shell. There's no point in deleting it, but you can remove it if you want.

If you uninstalled MacPorts (and deleted /opt), you can remove from your PATH all the subdirectories of /opt.

Just look in .profile, .bash_profile and .bashrc for any modification of your PATH.

For example, in my .profile MacPorts added:

export PATH=/opt/local/bin:/opt/local/sbin:$PATH


You can remove lines like this, or just single directories.