nv50: Remove unused value
What does this MR do and why?
nv50: Remove unused value
Fix defect reported by Coverity Scan.
Unused value (UNUSED_VALUE) assigned_pointer: Assigning value from &nv50->vtxbuf[b] to vb here, but that stored value is overwritten before it can be used.
Fixes: 76725452 ("gallium: move vertex stride to CSO") Signed-off-by: Vinson Lee vlee@freedesktop.org