Qbs: Remove unused method

Change-Id: Ib25b5155ac267cee7146bca22ac599ad96e4580b
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/qbsprojectmanager/qbsproject.cpp

@@ -247,11 +247,6 @@ bool QbsProject::hasParseResult() const
     return qbsProject().isValid();
 }
 
-FileName QbsProject::defaultBuildDirectory() const
-{
-    return defaultBuildDirectory(m_fileName);
-}
-
 Utils::FileName QbsProject::defaultBuildDirectory(const QString &path)
 {
     QFileInfo fi(path);

src/plugins/qbsprojectmanager/qbsproject.h

@@ -92,7 +92,6 @@ public:
     bool hasParseResult() const;
     void parseCurrentBuildConfiguration(bool force);
 
-    Utils::FileName defaultBuildDirectory() const;
     static Utils::FileName defaultBuildDirectory(const QString &path);
 
     qbs::Project qbsProject() const;