QTimeZone: drop an implicit conversion comment

The constructor isn't selected for conversions anyhow (it has
more than one argument), and in Qt we don't mark such constructors
as implicit (or explicit) anyways.

Change-Id: I4203b946b9c6934aef9eead2db96154f9851ab9a
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/time/qtimezone.h

@@ -92,7 +92,7 @@ public:
     QTimeZone() noexcept;
     explicit QTimeZone(const QByteArray &ianaId);
     explicit QTimeZone(int offsetSeconds);
-    /*implicit*/ QTimeZone(const QByteArray &zoneId, int offsetSeconds, const QString &name,
+    QTimeZone(const QByteArray &zoneId, int offsetSeconds, const QString &name,
               const QString &abbreviation, QLocale::Country country = QLocale::AnyCountry,
               const QString &comment = QString());
     QTimeZone(const QTimeZone &other);