FS: Removed unused ::openAndLock method

src/FS.cpp

@@ -399,12 +399,6 @@ bool File::open ()
   return false;
 }
 
-////////////////////////////////////////////////////////////////////////////////
-bool File::openAndLock ()
-{
-  return open () && lock ();
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 void File::close ()
 {

src/FS.h

@@ -81,7 +81,6 @@ public:
   virtual bool remove () const;
 
   bool open ();
-  bool openAndLock ();
   void close ();
 
   bool lock ();