Fix checkstyle issues

Author: s1ck

core/src/main/java/org/neo4j/gds/core/loading/construction/GraphFactory.java

@@ -44,7 +44,6 @@
 import org.neo4j.gds.core.huge.HugeGraph;
 import org.neo4j.gds.core.huge.HugeGraphBuilder;
 import org.neo4j.gds.core.loading.HighLimitIdMap;
-import org.neo4j.gds.core.loading.HighLimitIdMapBuilder;
 import org.neo4j.gds.core.loading.IdMapBuilder;
 import org.neo4j.gds.core.loading.ImmutableImportMetaData;
 import org.neo4j.gds.core.loading.ImportSizing;