Clean errant list fragment

It's unclear what causes these to appear, but it is believed to be
something between UCO Issue 435 where `rdf:List`s became fully
duplicated in SHACL shapes, the recent release of rdflib 6.2.0, and/or
potentially a bug in the rdf-toolkit normalization.

References:
* ucoProject/UCO#435

Signed-off-by: Alex Nelson <alexander.nelson@nist.gov>

tests/case_utils/case_validate/uco_test_examples/hash_XFAIL_validation.ttl

@@ -6,18 +6,6 @@
 @prefix vocabulary: <https://ontology.unifiedcyberontology.org/uco/vocabulary/> .
 @prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
 
-[]
-	rdf:first "MD6"^^vocabulary:HashNameVocab ;
-	rdf:rest (
-		"SHA1"^^vocabulary:HashNameVocab
-		"SHA224"^^vocabulary:HashNameVocab
-		"SHA256"^^vocabulary:HashNameVocab
-		"SHA384"^^vocabulary:HashNameVocab
-		"SHA512"^^vocabulary:HashNameVocab
-		"SSDEEP"^^vocabulary:HashNameVocab
-	) ;
-	.
-
 []
 	a sh:ValidationReport ;
 	sh:conforms "false"^^xsd:boolean ;