remove depreciated and unused src/GUI/trackball.*

diff --git a/src/GUI/Makefile.am b/src/GUI/Makefile.am
index 92bc5de7a2df3b6d0cf31b4f949b78f46a52aa16..f858803ab1321cd8dc1382acc4b16fb42902cc38 100644 (file)
--- a/src/GUI/Makefile.am
+++ b/src/GUI/Makefile.am
@@ -7,7 +7,6 @@ libGUI_a_SOURCES = \
        menubar.cxx menubar.hxx \
        gui.cxx gui.h gui_funcs.cxx \
        mouse.cxx fonts.cxx \
-       trackball.c trackball.h \
        AirportList.cxx AirportList.hxx \
         property_list.cxx property_list.hxx \
         layout.cxx layout-props.cxx layout.hxx \