Remove fStencilClearValue from Vulkan's CommandBufferInfo struct

Adding this extra field to the CommandBufferInfo may or may not have led to a memory regression.

Remove it until it is actually needed.

Change-Id: Ibdddbeb7625f91f5199584a575289f07f6e95304
Reviewed-on: https://skia-review.googlesource.com/33280
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/vk/GrVkGpu.cpp b/src/gpu/vk/GrVkGpu.cpp
index f152582..866e1ac 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -1973,7 +1973,6 @@
 void GrVkGpu::submitSecondaryCommandBuffer(const SkTArray<GrVkSecondaryCommandBuffer*>& buffers,
                                            const GrVkRenderPass* renderPass,
                                            const VkClearValue* colorClear,
-                                           const VkClearValue* stencilClear,
                                            GrVkRenderTarget* target,
                                            const SkIRect& bounds) {
     const SkIRect* pBounds = &bounds;
@@ -2007,7 +2006,8 @@
 #endif
     VkClearValue clears[2];
     clears[0].color = colorClear->color;
-    clears[1].depthStencil = stencilClear->depthStencil;
+    clears[1].depthStencil.depth = 0.0f;
+    clears[1].depthStencil.stencil = 0;
 
     fCurrentCmdBuffer->beginRenderPass(this, renderPass, clears, *target, *pBounds, true);
     for (int i = 0; i < buffers.count(); ++i) {