Revert of Add config options to run different GPU APIs to dm and nanobench

include/gpu/gl/SkNullGLContext.h

Index: include/gpu/gl/SkNullGLContext.h
diff --git a/include/gpu/gl/SkNullGLContext.h b/include/gpu/gl/SkNullGLContext.h
index 9e799a9fea4d9d7b9b832026f4c664aee7a797ec..1f634382641ec02dd336304f754a80c1ac78b5e2 100644
--- a/include/gpu/gl/SkNullGLContext.h
+++ b/include/gpu/gl/SkNullGLContext.h
@@ -14,12 +14,7 @@
 public:
     ~SkNullGLContext() override;
 
-    static SkNullGLContext* Create();
-    // FIXME: remove once Chromium has been updated.
-    static SkNullGLContext* Create(GrGLStandard forcedAPI) {
-        SkASSERT(forcedAPI == kNone_GrGLStandard);
-        (void)forcedAPI;        return Create();
-    }
+    static SkNullGLContext* Create(GrGLStandard);
 
     class ContextState;