Removed coolwanglu/pdf2htmlEX PPA from travis
Removed coolwanglu/pdf2htmlEX PPA from travis

stuartf/Hilary,nicolaasmatthijs/Hilary,jfederico/Hilary,simong/Hilary,timdegroote/Hilary,Orodan/Hilary,ExC0d3/Hilary,Orodan/Hilary,mrvisser/Hilary,timdegroote/Hilary,jfederico/Hilary,simong/Hilary,stuartf/Hilary,nicolaasmatthijs/Hilary,mrvisser/Hilary,ExC0d3/Hilary