Clean up hyper-local SkCpu feature test experiment.

src/core/SkCpu.cpp

Index: src/core/SkCpu.cpp
diff --git a/src/core/SkCpu.cpp b/src/core/SkCpu.cpp
index b296f0c02a5710b137e9e1bdf72669af2d743cff..0858abd40a7fcf22328926797c04ce034561372f 100644
--- a/src/core/SkCpu.cpp
+++ b/src/core/SkCpu.cpp
@@ -5,7 +5,6 @@
  * found in the LICENSE file.
  */
 
-#define SkCpu_IMPL
 #include "SkCpu.h"
 #include "SkOnce.h"
 
@@ -79,17 +78,9 @@
 
 #endif
 
-#if defined(_MSC_VER)
-    const uint32_t SkCpu::gCachedFeatures = read_cpu_features();
+uint32_t SkCpu::gCachedFeatures = 0;
 
-    void SkCpu::CacheRuntimeFeatures() {}
-
-#else
-    uint32_t SkCpu::gCachedFeatures = 0;
-
-    void SkCpu::CacheRuntimeFeatures() {
-        static SkOnce once;
-        once([] { gCachedFeatures = read_cpu_features(); });
-    }
-
-#endif
+void SkCpu::CacheRuntimeFeatures() {
+    static SkOnce once;
+    once([] { gCachedFeatures = read_cpu_features(); });
+}