graphics/mesa-dri: Remove upstreamed patch

I somehow didn't had the commit that added this patch on my test branch so
forgot to remove it.

Reported by:	Michael Butler <imb@protected-networks.net>
Sponsored by:	Beckhoff Automation GmbH & Co. KG

graphics/mesa-dri/files/patch-src_gallium_drivers_r600_sfn_sfn__optimizer.cpp

@@ -1,16 +0,0 @@
---- src/gallium/drivers/r600/sfn/sfn_optimizer.cpp.orig	2022-12-14 21:06:11 UTC
-+++ src/gallium/drivers/r600/sfn/sfn_optimizer.cpp
-@@ -354,7 +354,12 @@ CopyPropFwdVisitor::visit(AluInstr *instr)
-    auto src = instr->psrc(0);
-    auto dest = instr->dest();
- 
--   for (auto& i : dest->uses()) {
-+   auto ii = dest->uses().begin();
-+   auto ie = dest->uses().end();
-+
-+   while(ii != ie) {
-+      auto i = *ii;
-+      ++ii;
-       /* SSA can always be propagated, registers only in the same block
-        * and only if they are assigned in the same block */
-       bool can_propagate = dest->is_ssa();