[dxvk] Remove dead enableRtOutputNanFixup option

Dead code since 2.0, not sure why this was still in here.

src/d3d11/d3d11_options.cpp

@@ -14,7 +14,6 @@ namespace dxvk {
 
   D3D11Options::D3D11Options(const Config& config, const Rc<DxvkDevice>& device) {
     this->dcSingleUseMode       = config.getOption<bool>("d3d11.dcSingleUseMode", true);
-    this->enableRtOutputNanFixup   = config.getOption<bool>("d3d11.enableRtOutputNanFixup", false);
     this->zeroInitWorkgroupMemory  = config.getOption<bool>("d3d11.zeroInitWorkgroupMemory", false);
     this->forceVolatileTgsmAccess = config.getOption<bool>("d3d11.forceVolatileTgsmAccess", false);
     this->relaxedBarriers       = config.getOption<bool>("d3d11.relaxedBarriers", false);

src/d3d11/d3d11_options.h

@@ -20,10 +20,6 @@ namespace dxvk {
     /// than once.
     bool dcSingleUseMode;
 
-    /// Enables workaround to replace NaN render target
-    /// outputs with zero
-    bool enableRtOutputNanFixup;
-
     /// Zero-initialize workgroup memory
     ///
     /// Workargound for games that don't initialize

src/dxbc/dxbc_options.cpp

@@ -35,7 +35,6 @@ namespace dxvk {
     }
     
     invariantPosition        = options.invariantPosition;
-    enableRtOutputNanFixup   = options.enableRtOutputNanFixup;
     zeroInitWorkgroupMemory  = options.zeroInitWorkgroupMemory;
     forceVolatileTgsmAccess  = options.forceVolatileTgsmAccess;
     disableMsaa              = options.disableMsaa;
@@ -55,9 +54,6 @@ namespace dxvk {
           floatControl.set(DxbcFloatControlFlag::DenormPreserve64);
       }
     }
-
-    if (!devInfo.vk12.shaderSignedZeroInfNanPreserveFloat32)
-      enableRtOutputNanFixup = true;
   }
   
 }

src/dxbc/dxbc_options.h

@@ -31,9 +31,6 @@ namespace dxvk {
     /// atomic operations for append/consume buffers.
     bool useSubgroupOpsForAtomicCounters = false;
 
-    /// Enables NaN fixup for render target outputs
-    bool enableRtOutputNanFixup = false;
-
     /// Clear thread-group shared memory to zero
     bool zeroInitWorkgroupMemory = false;