Bash history without line numbers

Try this:

$ history | cut -c 8-

If you were willing to switch to zsh isntead of bash, then zsh supports this natively (as well as other options for history formatting)

zsh> fc -ln 0

(See https://serverfault.com/questions/114988/removing-history-or-line-numbers-from-zsh-history-file)

awk can help:

history|awk '{$1="";print substr($0,2)}'

This answer can fail if you have a long history.