Remove leftover command in README [ci skip]
Remove leftover command in README [ci skip]

deivid-rodriguez/byebug,guilherme/byebug,deivid-rodriguez/byebug,deivid-rodriguez/byebug,yui-knk/byebug,yui-knk/byebug,guilherme/byebug,yui-knk/byebug,guilherme/byebug