Removing the class "socioeconomic status category" and “socioeconomic status category population statistic

The examples of the class "socioeconomic status category" are 'Semi-routine and routine occupations, blue collar occupation' but these can already be captured by professions. Other aspects can be captured by 'socioeconomic
status' or 'socioeconomic status score'.

These suggested changes are also being communicated with the lead of the Population Ontology.