Fix some clazy warning

src/plugins/evolutionv3/evolutionsettings.cpp

@@ -49,8 +49,8 @@ void EvolutionSettings::loadAccount(const QString &filename)
     for (QDomElement e = config.firstChildElement(); !e.isNull(); e = e.nextSiblingElement()) {
         const QString tag = e.tagName();
         if (tag == QLatin1String("entry")) {
-            if (e.hasAttribute(QLatin1String("name"))) {
-                const QString attr = e.attribute(QLatin1String("name"));
+            if (e.hasAttribute(QStringLiteral("name"))) {
+                const QString attr = e.attribute(QStringLiteral("name"));
                 if (attr == QLatin1String("accounts")) {
                     readAccount(e);
                 } else if (attr == QLatin1String("signatures")) {

src/plugins/thunderbird/thunderbirdsettings.cpp

@@ -951,7 +951,7 @@ void ThunderbirdSettings::readIdentity(const QString &account)
         newIdentity->setPgpAutoSign(signMail);
     }
 
-    const QString composeHtmlStr(identity + QStringLiteral(".compose_html"));
+    // const QString composeHtmlStr(identity + QStringLiteral(".compose_html"));
     // TODO: implement it in kmail
 
     newIdentity->setSignature(signature);