Don't use return keyword when method doesn't return anything

Change-Id: Ia9757be7cb51fb946557d40134a93acd1aec0a94
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/libs/utils/mimetypes/mimedatabase.cpp

@@ -693,14 +693,14 @@ void Utils::setGlobPatternsForMimeType(const MimeType &mimeType, const QStringLi
 {
     auto d = MimeDatabasePrivate::instance();
     QMutexLocker locker(&d->mutex);
-    return d->provider()->setGlobPatternsForMimeType(mimeType, patterns);
+    d->provider()->setGlobPatternsForMimeType(mimeType, patterns);
 }
 
 void Utils::setMagicRulesForMimeType(const MimeType &mimeType, const QMap<int, QList<MimeMagicRule> > &rules)
 {
     auto d = MimeDatabasePrivate::instance();
     QMutexLocker locker(&d->mutex);
-    return d->provider()->setMagicRulesForMimeType(mimeType, rules);
+    d->provider()->setMagicRulesForMimeType(mimeType, rules);
 }
 
 void Utils::setMimeStartupPhase(MimeStartupPhase phase)