Remove unused RP stage pointer

Change-Id: I73922717d4ebd8c759f7fe5c7c8e8da4567a0aa9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/430039
Commit-Queue: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Reed <reed@google.com>
diff --git a/src/opts/SkRasterPipeline_opts.h b/src/opts/SkRasterPipeline_opts.h
index f805830..4694a9b 100644
--- a/src/opts/SkRasterPipeline_opts.h
+++ b/src/opts/SkRasterPipeline_opts.h
@@ -4034,7 +4034,6 @@
 // If a pipeline uses these stages, it'll boot it out of lowp into highp.
 #define NOT_IMPLEMENTED(st) static void (*st)(void) = nullptr;
     NOT_IMPLEMENTED(callback)
-    NOT_IMPLEMENTED(interpreter)
     NOT_IMPLEMENTED(unbounded_set_rgb)
     NOT_IMPLEMENTED(unbounded_uniform_color)
     NOT_IMPLEMENTED(unpremul)