Skip null check, per coverity

Dereference before null check

There may be a null pointer dereference, or else the comparison against null is unnecessary. All paths that lead to this null pointer comparison already dereference the pointer earlier
/ext/extractors/csv/csv_extractor.c:154: REVERSE_INULL 120743 Directly dereferencing pointer "parser".
/ext/extractors/csv/csv_extractor.c:198: REVERSE_INULL 120743 Null-checking "parser" suggests that it may be null, but it has already been dereferenced on all paths leading to the check.