diff --git a/panda/src/glxdisplay/config_glxdisplay.cxx b/panda/src/glxdisplay/config_glxdisplay.cxx
index 12dbbe6ad6..b65d1a28e7 100644
--- a/panda/src/glxdisplay/config_glxdisplay.cxx
+++ b/panda/src/glxdisplay/config_glxdisplay.cxx
@@ -29,17 +29,6 @@ ConfigureFn(config_glxdisplay) {
   init_libglxdisplay();
 }
 
-ConfigVariableString display_cfg
-("display", "",
- PRC_DESC("Specify the X display string for the default display.  If this "
-          "is not specified, $DISPLAY is used."));
-
-ConfigVariableBool x_error_abort
-("x-error-abort", false,
- PRC_DESC("Set this true to trigger and abort (and a stack trace) on receipt "
-          "of an error from the X window system.  This can make it easier "
-          "to discover where these errors are generated."));
-
 ConfigVariableBool glx_get_proc_address
 ("glx-get-proc-address", true,
  PRC_DESC("Set this to true to allow the use of glxGetProcAddress(), if "
@@ -54,30 +43,6 @@ ConfigVariableBool glx_get_os_address
           "addresses of extension functions.  This will be done only "
           "if glxGetProcAddress() cannot be used for some reason."));
 
-ConfigVariableInt x_wheel_up_button
-("x-wheel-up-button", 4,
- PRC_DESC("This is the mouse button index of the wheel_up event: which "
-          "mouse button number does the system report when the mouse wheel "
-          "is rolled one notch up?"));
-
-ConfigVariableInt x_wheel_down_button
-("x-wheel-down-button", 5,
- PRC_DESC("This is the mouse button index of the wheel_down event: which "
-          "mouse button number does the system report when the mouse wheel "
-          "is rolled one notch down?"));
-
-ConfigVariableInt x_wheel_left_button
-("x-wheel-left-button", 6,
- PRC_DESC("This is the mouse button index of the wheel_left event: which "
-          "mouse button number does the system report when one scrolls "
-          "to the left?"));
-
-ConfigVariableInt x_wheel_right_button
-("x-wheel-right-button", 7,
- PRC_DESC("This is the mouse button index of the wheel_right event: which "
-          "mouse button number does the system report when one scrolls "
-          "to the right?"));
-
 ConfigVariableBool glx_support_pbuffer
 ("glx-support-pbuffer", false,
  PRC_DESC("Set this true to enable the use of X pbuffer-based offscreen "
diff --git a/panda/src/glxdisplay/config_glxdisplay.h b/panda/src/glxdisplay/config_glxdisplay.h
index 94749acd98..7bd64e31b0 100644
--- a/panda/src/glxdisplay/config_glxdisplay.h
+++ b/panda/src/glxdisplay/config_glxdisplay.h
@@ -25,16 +25,9 @@ NotifyCategoryDecl(glxdisplay, EXPCL_PANDAGL, EXPTP_PANDAGL);
 
 extern EXPCL_PANDAGL void init_libglxdisplay();
 
-extern ConfigVariableString display_cfg;
-extern ConfigVariableBool x_error_abort;
 extern ConfigVariableBool glx_get_proc_address;
 extern ConfigVariableBool glx_get_os_address;
 
-extern ConfigVariableInt x_wheel_up_button;
-extern ConfigVariableInt x_wheel_down_button;
-extern ConfigVariableInt x_wheel_left_button;
-extern ConfigVariableInt x_wheel_right_button;
-
 extern ConfigVariableBool glx_support_pbuffer;
 extern ConfigVariableBool glx_support_pixmap;