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diff --git a/hacks/glx/bubble3d.h b/hacks/glx/bubble3d.h
deleted file mode 100644
index 4cbdd754..00000000
--- a/hacks/glx/bubble3d.h
+++ /dev/null
@@ -1,90 +0,0 @@
-/* GLBUBBLES (C) 1998 Richard W.M. Jones. */
-
-#ifndef __bubbles3d_h__
-#define __bubbles3d_h__
-
-#include <X11/Intrinsic.h>
-
-#ifdef STANDALONE
-# include <math.h>
-# include "xlockmoreI.h"	/* from the xscreensaver distribution */
-#else /* !STANDALONE */
-# include "xlock.h"		/* from the xlockmore distribution */
-#endif /* !STANDALONE */
-
-#include <GL/gl.h>
-#include <GL/glu.h>
-
-/* Static configuration. */
-#define GLB_SLOW_GL          1	/* Set this if you have a slow GL
-				   * implementation. If you have an accelerated
-				   * graphics card, set this to 0.
-				 */
-#define GLB_USE_BLENDING     0	/* Use alpha feature to create see-through
-				   * bubbles.
-				 */
-#define GLB_VERTICES_EPSILON 0.0005	/* How close are identical vertices? */
-
-/* Configuration structure. */
-struct glb_config {
-	int         subdivision_depth;	/* Controls how many triangles are in
-					 * each bubble. 2 and 3 are good values.
-					 */
-	int         nr_nudge_axes;	/* Number of directions in which each
-					 * bubble gets stretched. Values between
-					 * 3 and 7 seem to produce good results.
-					 */
-	GLfloat     nudge_angle_factor;		/* Max. amount of rotation in nudge angles.
-						 * Controls the amount of `wobble' we see,
-						 * and 0.3 seems to work well.
-						 */
-	GLfloat     nudge_factor;	/* Max. displacement of any single nudge.
-					 * Controls the amount of the wobble. Depends
-					 * on NR_NUDGE_AXES, and must not exceed
-					 * 1 / NR_NUDGE_AXES. 0.1 is good.
-					 */
-	GLfloat     rotation_factor;	/* Max. amount by which bubbles rotate. */
-	int         create_bubbles_every;	/* How often to create new bubbles. */
-	int         max_bubbles;	/* Max. number of bubbles to create. */
-	double      p_bubble_group[4];	/* Probabilities of creating 1, 2, 3, 4
-					 * bubbles in a group. Cumulative.
-					 */
-	GLfloat     max_size;	/* Max. size. */
-	GLfloat     min_size;	/* Min. size of bubbles. */
-	GLfloat     max_speed;	/* Max. speed. */
-	GLfloat     min_speed;	/* Min. speed of bubbles. */
-	GLfloat     scale_factor;	/* Factor by which bubbles scale from bottom
-					 * of screen to top. 1.5 - 2.0 are OK.
-					 */
-	GLfloat     screen_bottom;	/* Bottom of screen. */
-	GLfloat     screen_top;	/* Top of screen. */
-	GLfloat     bg_colour[4];	/* Background colour. */
-	GLfloat     bubble_colour[4];	/* Colour of the bubbles. */
-};
-
-extern struct glb_config glb_config;
-
-#define glb_drand() ((double)LRAND() / (double)MAXRAND)
-
-/*-- From glb_sphere.c. --*/
-typedef GLfloat glb_vertex[3];
-typedef GLuint glb_triangle[3];
-extern void glb_sphere_init(void);
-extern glb_vertex *glb_sphere_get_vertices(int *nr_vertices);
-extern glb_triangle *glb_sphere_get_triangles(int *nr_triangles);
-extern void glb_sphere_end(void);
-
-/*-- From glb_bubble.c. --*/
-extern void *glb_bubble_new(GLfloat x, GLfloat y, GLfloat z, GLfloat scale,
-			    GLfloat y_incr, GLfloat scale_incr);
-extern void glb_bubble_delete(void *);
-extern void glb_bubble_step(void *);
-extern void glb_bubble_draw(void *);
-extern GLfloat glb_bubble_get_y(void *);
-
-/*-- From glb_draw.c. --*/
-extern void *glb_draw_init(void);
-extern void glb_draw_step(void *);
-extern void glb_draw_end(void *);
-
-#endif /* __bubbles3d_h__ */