zink: Remove duplicate variable unsized.

Fix defect reported by Coverity Scan.

Evaluation order violation (EVALUATION_ORDER) write_write_typo: In unsized = unsized = glsl_array_type(glsl_uintN_t_type(bit_size), 0U, bit_size / 8U), unsized is written twice with the same value.

Fixes: f79a2565 ("zink: move all shader bo/sharedmem access to compiler passes") Signed-off-by: Vinson Lee vlee@freedesktop.org