README: Remove instructions for changing the DBpedia endpoint
README: Remove instructions for changing the DBpedia endpoint

The canonical description is in data/dbpedia/README.md.

Prompted by Vineet Kumar.

vineetk1/yodaqa,vineetk1/yodaqa,Martinfx/yodaqa,Martinfx/yodaqa,Martinfx/yodaqa,vineetk1/yodaqa,vineetk1/yodaqa,vineetk1/yodaqa,vineetk1/yodaqa,Martinfx/yodaqa,Martinfx/yodaqa,Martinfx/yodaqa