[Python] Remove dynamic indirection

Now that the Python plugin relies on the SWIG symbols, we no longer need
to dynamically resolve these functions.

llvm-svn: 357034

lldb/source/API/SystemInitializerFull.h

@@ -27,9 +27,6 @@ public:
 
   llvm::Error Initialize() override;
   void Terminate() override;
-
-private:
-  void InitializeSWIG();
 };
 
 } // namespace lldb_private