remove_aes: remove aes() function call
Description
ggbash() tries to follow ggplot2 original syntax
as much as possible.
When aes() function calls is specified in a given
ggbash string, those are safely removed by this function.
Usage
remove_aes(input = "gg(a) + p(aes(x,y),c) + p(aes(l),d)")