remove redundant aggregation of Emi|CO2|Transport|Road|Demand and |Tailpipe

[orichters]

• is already present later around line 565:

  `Emi|CO2|Transport|Road|Tailpipe` = c("Emi|CO2|Transport|Pass|Road|Tailpipe", "Emi|CO2|Transport|Freight|Road|Tailpipe"),
  `Emi|CO2|Transport|Road|Demand` = c("Emi|CO2|Transport|Pass|Road|Demand", "Emi|CO2|Transport|Freight|Road|Demand"),

• causes World value to be doubled, probably because the duplicated values are dropped after the regional aggregation.

  Emissions|CO2|Energy|Demand|Transportation|Road >                 Emi|CO2|Transport|Road|Demand >
  + Emissions|CO2|Energy|Demand|Transportation|Road|Freight         + Emi|CO2|Transport|Freight|Road|Demand
  + Emissions|CO2|Energy|Demand|Transportation|Road|Passenger       + Emi|CO2|Transport|Pass|Road|Demand
  Relative difference between 50% and 50%, absolute difference up to 7518 Mt CO2/yr.