dot-bashrc: Remove cruft

Signed-off-by: Sujith Manoharan <m.sujith@gmail.com>
dot-bashrc: Fix email addresses

Signed-off-by: Sujith Manoharan <m.sujith@gmail.com>
dot-bashrc: Cleanup aliases

Signed-off-by: Sujith Manoharan <m.sujith@gmail.com>