All three of GLX_NV_float_buffer, GLX_EXT_texture_from_pixmap and
GLX_MESA_query_renderer have been in glxext.h for a while now.
As such we can drop this workaround/hack from the header.
v2: Remove the comment about GLX_NV_float_buffer.
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com> (v1)
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