remove obsolete username config from yaws.tex
remove obsolete username config from yaws.tex

The "username" global config setting was removed from the code ages
ago but it was still in the LaTeX doc. Remove it.

patternmatched/yaws,weisslj/yaws,watonyweng/yaws,toraritte/azith,sebgod/yaws,namjae/yaws,sebgod/yaws,weisslj/yaws,weisslj/yaws,imtal/yaws,namjae/yaws,zephyrean/yaws,toraritte/azith,sebgod/yaws,phonohawk/yaws,watonyweng/yaws,jgrinstead/yaws,imtal/yaws,weisslj/yaws,ca91/yaws,ca91/yaws,jgrinstead/yaws,patternmatched/yaws,bsmr-erlang/yaws,andreineculau/yaws,bsmr-erlang/yaws,capflam/yaws,leoliu/yaws,klacke/yaws,phonohawk/yaws,capflam/yaws,namjae/yaws,zephyrean/yaws,patternmatched/yaws,namjae/yaws,sebgod/yaws,patternmatched/yaws,patternmatched/yaws,phonohawk/yaws,zephyrean/yaws,klacke/yaws,ca91/yaws,sebgod/yaws,bsmr-erlang/yaws,jgrinstead/yaws,weisslj/yaws,klacke/yaws,watonyweng/yaws,zephyrean/yaws,watonyweng/yaws,phonohawk/yaws,zephyrean/yaws,jgrinstead/yaws,imtal/yaws,capflam/yaws,toraritte/azith,klacke/yaws,namjae/yaws,toraritte/azith,klacke/yaws,namjae/yaws,weisslj/yaws,ca91/yaws,sebgod/yaws,capflam/yaws,phonohawk/yaws,zephyrean/yaws,watonyweng/yaws,ca91/yaws,ca91/yaws,imtal/yaws,capflam/yaws,andreineculau/yaws,jgrinstead/yaws,toraritte/azith,jgrinstead/yaws,patternmatched/yaws,leoliu/yaws,imtal/yaws,ca91/yaws,leoliu/yaws,watonyweng/yaws,leoliu/yaws,toraritte/azith,zephyrean/yaws,namjae/yaws,watonyweng/yaws,patternmatched/yaws,sebgod/yaws,leoliu/yaws,capflam/yaws,weisslj/yaws,bsmr-erlang/yaws,bsmr-erlang/yaws,toraritte/azith,phonohawk/yaws,capflam/yaws,klacke/yaws,leoliu/yaws,phonohawk/yaws,bsmr-erlang/yaws,klacke/yaws,andreineculau/yaws,jgrinstead/yaws,imtal/yaws,leoliu/yaws,imtal/yaws,andreineculau/yaws,andreineculau/yaws,bsmr-erlang/yaws