COMP: Revert tcl precision to default value

Some time ago, the tcl_precision was set to 6 digits. This patch
removes the explicit setting of tcl_precision so that applications
will see the default precision (12 digits) unless the application
changes it explicitly.

Change-Id: I852d2f996efd08e8a3548272a6739d834d14165c

Wrapping/Tools/vtkWrapTclInit.c

@@ -135,14 +135,6 @@ static void CreateInitFile(const char *libName,
     fprintf(fout,"  Tcl_CreateCommand(interp,(char *)(\"vtkCommand\"),\n"
       "                    reinterpret_cast<vtkTclCommandType>(vtkCreateCommand),\n"
       "                    static_cast<ClientData *>(NULL), NULL);\n\n");
-
-    /*
-     * Set the default precision of tcl to match the legacy vtk default
-     * precsion.  Wrapped code will use the tcl_precision variable to
-     * define the output resolution for converting doubles to strings
-     */
-    fprintf(fout,
-            "  Tcl_SetVar2(interp, \"tcl_precision\", (char *) NULL, \"6\", TCL_GLOBAL_ONLY);\n");
     }
 
   for (i = 0; i < numCommands; i++)