cmDefinitions: Remove unused method.

Source/cmDefinitions.cxx

@@ -20,13 +20,6 @@ cmDefinitions::cmDefinitions(cmDefinitions* parent)
 {
 }
 
-//----------------------------------------------------------------------------
-void cmDefinitions::Reset(cmDefinitions* parent)
-{
-  this->Up = parent;
-  this->Map.clear();
-}
-
 //----------------------------------------------------------------------------
 cmDefinitions::Def const&
 cmDefinitions::GetInternal(const std::string& key)

Source/cmDefinitions.h

@@ -30,9 +30,6 @@ public:
   /** Construct with the given parent scope.  */
   cmDefinitions(cmDefinitions* parent = 0);
 
-  /** Reset object as if newly constructed.  */
-  void Reset(cmDefinitions* parent = 0);
-
   /** Returns the parent scope, if any.  */
   cmDefinitions* GetParent() const { return this->Up; }