Revert of Fix 4444 on Vulkan devices who don't support RGBA_4444

src/gpu/vk/GrVkCaps.cpp

Index: src/gpu/vk/GrVkCaps.cpp
diff --git a/src/gpu/vk/GrVkCaps.cpp b/src/gpu/vk/GrVkCaps.cpp
index 9027f6881557467384dd261df228250553a464ee..cf9f4f025e0a2a8d4b53a25a3a5f9ba711256803 100644
--- a/src/gpu/vk/GrVkCaps.cpp
+++ b/src/gpu/vk/GrVkCaps.cpp
@@ -137,16 +137,7 @@
             glslCaps->fConfigTextureSwizzle[i] = GrSwizzle::RRRR();
             glslCaps->fConfigOutputSwizzle[i] = GrSwizzle::AAAA();
         } else {
-            if (kRGBA_4444_GrPixelConfig == config) {
-                // The vulkan spec does not require R4G4B4A4 to be supported for texturing so we
-                // store the data in a B4G4R4A4 texture and then swizzle it when doing texture reads
-                // or writing to outputs. Since we're not actually changing the data at all, the
-                // only extra work is the swizzle in the shader for all operations.
-                glslCaps->fConfigTextureSwizzle[i] = GrSwizzle::BGRA();
-                glslCaps->fConfigOutputSwizzle[i] = GrSwizzle::BGRA();
-            } else {
-                glslCaps->fConfigTextureSwizzle[i] = GrSwizzle::RGBA();
-            }
+            glslCaps->fConfigTextureSwizzle[i] = GrSwizzle::RGBA();
         }
     }