Un-plumb dstColorSpace through GrTextureProducer

All unused.

Bug: skia:
Change-Id: I35b32874b0865ff7a33560f9a7b80df603eac6f4
Reviewed-on: https://skia-review.googlesource.com/c/163885
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
diff --git a/src/gpu/GrTextureAdjuster.cpp b/src/gpu/GrTextureAdjuster.cpp
index aa478aa..d30a1a4 100644
--- a/src/gpu/GrTextureAdjuster.cpp
+++ b/src/gpu/GrTextureAdjuster.cpp
@@ -73,7 +73,6 @@
 
 sk_sp<GrTextureProxy> GrTextureAdjuster::onRefTextureProxyForParams(
         const GrSamplerState& params,
-        SkColorSpace* dstColorSpace,
         sk_sp<SkColorSpace>* texColorSpace,
         bool willBeMipped,
         SkScalar scaleAdjust[2]) {
@@ -130,7 +129,7 @@
     }
     SkScalar scaleAdjust[2] = { 1.0f, 1.0f };
     sk_sp<GrTextureProxy> proxy(
-            this->refTextureProxyForParams(samplerState, nullptr, nullptr, scaleAdjust));
+            this->refTextureProxyForParams(samplerState, nullptr, scaleAdjust));
     if (!proxy) {
         return nullptr;
     }