fix compiler warnings (which are treated as errors in OR)

Signed-off-by: Matt Liberty <mliberty@precisioninno.com>

graph/Graph.i

@@ -27,13 +27,6 @@
 #include "Search.hh"
 #include "Sta.hh"
 
-namespace sta {
-
-Graph *
-cmdGraph();
-
-} // namespace
-
 using namespace sta;
 
 %}

tcl/StaTclTypes.i

@@ -233,6 +233,7 @@ tclListSeqConstChar(Tcl_Obj *const source,
     return nullptr;
 }
 
+#ifdef UNUSED
 static StdStringSet *
 tclListSetStdString(Tcl_Obj *const source,
 		    Tcl_Interp *interp)
@@ -252,6 +253,7 @@ tclListSetStdString(Tcl_Obj *const source,
   else
     return nullptr;
 }
+#endif
 
 ////////////////////////////////////////////////////////////////
 
@@ -367,6 +369,7 @@ objectListNext(const char *list,
   }
 }
 
+#ifdef UNUSED
 static Tcl_Obj *
 tclArcDcalcArg(ArcDcalcArg &gate,
                Tcl_Interp *interp)
@@ -432,6 +435,7 @@ arcDcalcArgTcl(Tcl_Obj *obj,
   }
   return ArcDcalcArg();
 }
+#endif
 
 } // namespace