ProjectExplorer: Replace ToolChainFactory::supportedLanguange

... by a member-based approach.

Change-Id: I5c7fef196df6c37fd26c60a58c774426eca562a0
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/nim/project/nimtoolchainfactory.cpp

@@ -44,6 +44,7 @@ NimToolChainFactory::NimToolChainFactory()
 {
     setDisplayName(tr("Nim"));
     setSupportedToolChainType(Constants::C_NIMTOOLCHAIN_TYPEID);
+    setSupportedLanguages({Constants::C_NIMLANGUAGE_ID});
 }
 
 bool NimToolChainFactory::canCreate()
@@ -69,11 +70,6 @@ ToolChain *NimToolChainFactory::restore(const QVariantMap &data)
     return nullptr;
 }
 
-QSet<Core::Id> NimToolChainFactory::supportedLanguages() const
-{
-    return {Constants::C_NIMLANGUAGE_ID};
-}
-
 QList<ToolChain *> NimToolChainFactory::autoDetect(const QList<ToolChain *> &alreadyKnown)
 {
     QList<ToolChain *> result;