remove SK_DISABLE_OPLIST_SORTING from SkUserConfig.h

As of the following CL, Skia no longer uses this #define

https://skia-review.googlesource.com/c/skia/+/210630 (Enable opList sorting everywhere)

Change-Id: I96e4958244e453ae63b0b84b7ceaf9822736afb4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1584823Reviewed-by: Florin Malita <fmalita@chromium.org>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Cr-Commit-Position: refs/heads/master@{#654867}

skia/config/SkUserConfig.h

@@ -153,11 +153,6 @@ SK_API void SkDebugf_FileLine(const char* file, int line, bool fatal,
 #define SK_SUPPORT_LEGACY_DRAWLOOPER
 #endif
 
-// Chrome should only sort opLists within DDLs
-#ifndef SK_DISABLE_OPLIST_SORTING
-#define SK_DISABLE_OPLIST_SORTING
-#endif
-
 #ifndef SK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS
 #define SK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS
 #endif