Removed unused namespaces

Author: namedgraph

config/dataspaces.trig

@@ -1,12 +1,7 @@
 @prefix lapp:	<https://w3id.org/atomgraph/linkeddatahub/apps#> .
-@prefix ldh:	<https://w3id.org/atomgraph/linkeddatahub#> .
 @prefix ac:	    <https://w3id.org/atomgraph/client#> .
-@prefix rdf:	<http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
-@prefix rdfs:	<http://www.w3.org/2000/01/rdf-schema#> .
-@prefix xsd:	<http://www.w3.org/2001/XMLSchema#> .
 @prefix ldt:	<https://www.w3.org/ns/ldt#> .
 @prefix dct:	<http://purl.org/dc/terms/> .
-@prefix foaf:	<http://xmlns.com/foaf/0.1/> .
 
 ### do not use blank nodes to identify resources! ###
 ### urn: URI scheme is used because applications are not accessible in their own dataspace (under $BASE_URI) ###

config/system.trig

@@ -1,6 +1,5 @@
 @prefix lapp:	<https://w3id.org/atomgraph/linkeddatahub/apps#> .
 @prefix a:	    <https://w3id.org/atomgraph/core#> .
-@prefix rdf:	<http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
 @prefix ldt:	<https://www.w3.org/ns/ldt#> .
 @prefix sd:	    <http://www.w3.org/ns/sparql-service-description#> .
 @prefix dct:	<http://purl.org/dc/terms/> .