```sh
unalias name
```
Removes previously defined alias and return true/false based if an alias was actually removed.
The alias name to remove.
A true/false value in case an alias with the provided name existed.
```sh
alias my_echo echo [ECHO]
my_echo hello world
unalias my_echo
echo The script will now error as my_echo is no longer defined
my_echo hello world
```