Remove .lib artifact from pogo build

Build/scripts/pgo/post_pgo.cmd

@@ -28,6 +28,7 @@ if "%binpath_pgo%"=="" (
 set POGO_TYPE=
 
 REM Clean binaries we no longer need
+if exist %binpath_pgo%\*.lib ( del %binpath_pgo%\*.lib )
 if exist %binpath_pgo%\*.pgc ( del %binpath_pgo%\*.pgc )
 if exist %binpath_pgo%\*.pgd ( del %binpath_pgo%\*.pgd )
 if exist %binpath_pgo%\pgort* ( del %binpath_pgo%\pgort* )