Qnx: Only save active configurations

Change-Id: Id077fe47b59103331cbd76862cd301307a1678fd
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/qnx/blackberryconfigurationmanager.cpp

@@ -224,6 +224,8 @@ void BlackBerryConfigurationManager::saveActiveConfigurationNdkEnvPath()
     settings->beginGroup(SettingsGroup);
     settings->beginGroup(ActiveNDKsGroup);
 
+    settings->remove(QString());
+
     foreach (BlackBerryConfiguration *config, activeConfigurations()) {
         settings->beginGroup(config->displayName());
         settings->setValue(NDKEnvFileKey, config->ndkEnvFile().toString());