Remove unused imports.

Author: toinehartman

src/org/rascalmpl/compiler/lang/rascalcore/check/tests/StaticTestingUtils.rsc

@@ -37,10 +37,8 @@ module lang::rascalcore::check::tests::StaticTestingUtils
 import IO;
 import String;
 import Location;
-import Map;
 import Message;
 import Relation;
-import Relation;
 import Set;
 import util::Reflective;
 import ParseTree;