further refactoring: move fetching hypothesis from rodin directly into the reasoner.

de.prob.eventb.disprover.core/src/de/prob/eventb/disprover/core/DisproverReasonerInput.java

@@ -48,16 +48,6 @@ public class DisproverReasonerInput implements IReasonerInput {
 		return node;
 	}
 
-	/**
-	 * @param sequent
-	 *            , the sequent to prove
-	 * @return the required Hypothesis, depending on {@link #mode}.
-	 * @throws DisproverException
-	 */
-	public Iterable<Predicate> getHypotheses(IProverSequent sequent) {
-		return sequent.visibleHypIterable();
-	}
-
 	public int getMaxInt() {
 		return maxInt;
 	}

de.prob.eventb.disprover.core/src/de/prob/eventb/disprover/core/internal/DisproverReasoner.java

@@ -66,7 +66,7 @@ public class DisproverReasoner implements IReasoner {
 			RodinDBException {
 
 		Set<Predicate> hypotheses = new HashSet<Predicate>();
-		for (Predicate predicate : disproverInput.getHypotheses(sequent)) {
+		for (Predicate predicate : sequent.visibleHypIterable()) {
 			hypotheses.add(predicate);
 		}
 		Predicate goal = sequent.goal();