mesa: Remove prototypes for nonexistent functions

_mesa_UseShaderProgramEXT, _mesa_ActiveProgramEXT, and
_mesa_CreateShaderProgramEXT were all removed when support for
GL_EXT_separate_shader_objects was removed.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
diff --git a/src/mesa/main/shaderapi.h b/src/mesa/main/shaderapi.h
index 17b05b3..047d256 100644
--- a/src/mesa/main/shaderapi.h
+++ b/src/mesa/main/shaderapi.h
@@ -205,15 +205,6 @@
                          struct gl_shader_program *shProg,
                          struct gl_pipeline_object *shTarget);
 
-extern void GLAPIENTRY
-_mesa_UseShaderProgramEXT(GLenum type, GLuint program);
-
-extern void GLAPIENTRY
-_mesa_ActiveProgramEXT(GLuint program);
-
-extern GLuint GLAPIENTRY
-_mesa_CreateShaderProgramEXT(GLenum type, const GLchar *string);
-
 extern void
 _mesa_copy_linked_program_data(gl_shader_stage type,
                                const struct gl_shader_program *src,