pagelines_welcome_finally adds the flavor text at the end of the theme Welcome page.
NB: my_pagelines_welcome_finally is an example name, please use a more appropriately named function in your code.
If you did not want to display this default text at the end of the theme Welcome page:
you can simply add this to your (Child-Theme) functions.php file:
Now, if you wanted to change the text to something that Bruce Willis might say you could do this instead:
Leaving your something like this: