remove unused findChild overload with default arg

src/plugins/debugger/gdbmi.cpp

@@ -277,18 +277,6 @@ GdbMi GdbMi::findChild(const QByteArray &name) const
     return GdbMi();
 }
 
-
-GdbMi GdbMi::findChild(const QByteArray &name, const QByteArray &defaultData) const
-{
-    for (int i = 0; i < m_children.size(); ++i)
-        if (m_children.at(i).m_name == name)
-            return m_children.at(i);
-    GdbMi result;
-    result.m_data = defaultData;
-    return result;
-}
-
-
 //////////////////////////////////////////////////////////////////////////////////
 //
 // GdbResultRecord

src/plugins/debugger/gdbmi.h

@@ -122,7 +122,6 @@ public:
     const GdbMi &childAt(int index) const { return m_children[index]; } 
     GdbMi &childAt(int index) { return m_children[index]; }
     GdbMi findChild(const QByteArray &name) const;
-    GdbMi findChild(const QByteArray &name, const QByteArray &defaultString) const;
 
     QByteArray toString(bool multiline = false, int indent = 0) const;
     void fromString(const QByteArray &str);