Delete the comments from the CodeSystemLookupDictionary

[brynrhodes]

The comments at the top of the page:

https://github.com/cqframework/cqf-tooling/blob/master/src/main/java/org/opencds/cqf/terminology/CodeSystemLookupDictionary.java#L5

Are inconsistent with what's actually in the dictionary and should just be removed as unhelpful.

However, DO NOT REMOVE THE COMMENT THAT CAPTURES THE SOURCE AND VERSION FROM WHICH THIS CONTENT WAS PRODUCED.