Remove unused variables

Removing a few unused variables in auto tests that were triggering
`-Wunused-but-set-variable`.

Pick-to: 6.5
Change-Id: I74bd0d7335d8bddeb18687b18c8a8be965f9fa20
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

tests/auto/corelib/itemmodels/qsortfilterproxymodel/tst_qsortfilterproxymodel.cpp

@@ -1257,7 +1257,6 @@ void tst_QSortFilterProxyModel::filterHierarchy()
 
 void tst_QSortFilterProxyModel::buildHierarchy(const QStringList &l, QAbstractItemModel *m)
 {
-    int ind = 0;
     int row = 0;
     QStack<int> row_stack;
     QModelIndex parent;
@@ -1265,14 +1264,12 @@ void tst_QSortFilterProxyModel::buildHierarchy(const QStringList &l, QAbstractIt
     for (int i = 0; i < l.size(); ++i) {
         QString token = l.at(i);
         if (token == QLatin1String("<")) { // start table
-            ++ind;
             parent_stack.push(parent);
             row_stack.push(row);
             parent = m->index(row - 1, 0, parent);
             row = 0;
             QVERIFY(m->insertColumns(0, 1, parent)); // add column
         } else if (token == QLatin1String(">")) { // end table
-            --ind;
             parent = parent_stack.pop();
             row = row_stack.pop();
         } else { // append row
@@ -1288,21 +1285,18 @@ void tst_QSortFilterProxyModel::buildHierarchy(const QStringList &l, QAbstractIt
 void tst_QSortFilterProxyModel::checkHierarchy(const QStringList &l, const QAbstractItemModel *m)
 {
     int row = 0;
-    int indent = 0;
     QStack<int> row_stack;
     QModelIndex parent;
     QStack<QModelIndex> parent_stack;
     for (int i = 0; i < l.size(); ++i) {
         QString token = l.at(i);
         if (token == QLatin1String("<")) { // start table
-            ++indent;
             parent_stack.push(parent);
             row_stack.push(row);
             parent = m->index(row - 1, 0, parent);
             QVERIFY(parent.isValid());
             row = 0;
         } else if (token == QLatin1String(">")) { // end table
-            --indent;
             parent = parent_stack.pop();
             row = row_stack.pop();
         } else { // compare row

tests/auto/corelib/tools/qset/tst_qset.cpp

@@ -939,13 +939,11 @@ void tst_QSet::javaIterator()
     QSetIterator<QString> i(set1);
     QSetIterator<QString> j(set1);
 
-    int n = 0;
     while (i.hasNext()) {
         QVERIFY(j.hasNext());
         set1.remove(i.peekNext());
         sum1 += toNumber(i.next());
         sum2 += toNumber(j.next());
-        ++n;
     }
     QVERIFY(!j.hasNext());
     QVERIFY(sum1 == 24999 * 25000 / 2);

tests/auto/network/access/qnetworkdiskcache/tst_qnetworkdiskcache.cpp

@@ -693,8 +693,6 @@ public:
         QNetworkDiskCache cache;
         cache.setCacheDirectory(cachePath);
 
-        int read = 0;
-
         int i = 0;
         for (; i < 5000; ++i) {
             if (other && other->isFinished())
@@ -745,7 +743,6 @@ public:
                     }
                     if (gotMetaData.isValid())
                         QVERIFY(x == longString || x == longString2);
-                    read++;
                     delete d;
                 }
             }
@@ -755,7 +752,6 @@ public:
                 cache.clear();
             sleep(std::chrono::seconds{0});
         }
-        //qDebug() << "read!" << read << i;
     }
 
     QDateTime dt;