This reverts commit
82f8c239506ef126dcad266156f8945c62dc6bc9.
KHR_texture_compression_astc_sliced_3d is not a requirement for
GLES 3.2.
Reported-by: Ilia Mirkin <imirkin@alum.mit.edu>\
Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com>
GL_KHR_debug DONE (all drivers)
GL_KHR_robustness DONE (i965)
GL_KHR_texture_compression_astc_ldr DONE (i965/gen9+)
- GL_KHR_texture_compression_astc_sliced_3d DONE (i965/gen9+)
GL_OES_copy_image DONE (i965)
GL_OES_draw_buffers_indexed DONE (all drivers that support GL_ARB_draw_buffers_blend)
GL_OES_draw_elements_base_vertex DONE (all drivers)