Revert "venus: temporarily redirect VkDrmFormatModifierPropertiesListEXT to "2" variant"

No longer need to redirect, since the renderer should use the fixed
decoder for VkDrmFormatModifierPropertiesListEXT::drmFormatModifierCount
by now.

This reverts commit 525b8c582f2e8e3e8f12589c1d384d683fee5dc4.

Signed-off-by: Ryan Neph <ryanneph@google.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21395>
2 files changed