🚨 fix linter warning and test failure

Author: reb-ddm

src/checker/dd/DDAlternatingChecker.cpp

@@ -105,7 +105,7 @@ EquivalenceCriterion DDAlternatingChecker::checkEquivalence() {
 
   // if partial equivalence is being checked instead of total equivalence, it
   // suffices to change the last parameter of isCloseToIdentity to `false`
-  bool isClose = dd->isCloseToIdentity(
+  const bool isClose = dd->isCloseToIdentity(
       functionality, configuration.functionality.traceThreshold, garbage, true);
 
   if (isClose) {

test/test_partial_equivalence.cpp

@@ -101,7 +101,6 @@ TEST_F(PartialEqualityTest, AlternatingCheckerGarbageAndAncillary) {
   qc1.cx(2, 0);
 
   qc::QuantumComputation qc3(nqubits - 1);
-  qc3.setLogicalQubitGarbage(2);
   qc3.setLogicalQubitGarbage(1);
 
   qc3.h(0);