remove obsolete flags

These no longer appear in the skia src tree.

Change-Id: If5702b671ca5910905b5e685e02ef8624e254734
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2132832Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
Cr-Commit-Position: refs/heads/master@{#755546}

skia/config/SkUserConfig.h

@@ -195,22 +195,12 @@ SK_API void SkDebugf_FileLine(const char* file,
 #   define SK_SUPPORT_LEGACY_ANISOTROPIC_MIPMAP_SCALE
 #endif
 
-// Remove this after we fixed all the issues related to the new SDF algorithm
-// (https://codereview.chromium.org/1643143002)
-#ifndef SK_USE_LEGACY_DISTANCE_FIELDS
-#define SK_USE_LEGACY_DISTANCE_FIELDS
-#endif
-
 // For now, Chrome should only attempt to reduce opList splitting when recording
 // DDLs
 #ifndef SK_DISABLE_REDUCE_OPLIST_SPLITTING
 #define SK_DISABLE_REDUCE_OPLIST_SPLITTING
 #endif
 
-#ifndef SK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS
-#define SK_IGNORE_LINEONLY_AA_CONVEX_PATH_OPTS
-#endif
-
 // Max. verb count for paths rendered by the edge-AA tessellating path renderer.
 #define GR_AA_TESSELLATOR_MAX_VERB_COUNT 100
 
@@ -218,15 +208,8 @@ SK_API void SkDebugf_FileLine(const char* file,
 #define SK_SUPPORT_LEGACY_AAA_CHOICE
 #endif
 
-// We're turning this off indefinitely,
-// until we can figure out some fundamental problems with its approach.
-//
-// See chromium:913223, skia:6886.
-#define SK_DISABLE_DAA
-
 // Staging for lowp::bilerp_clamp_8888, and for planned misc. others.
 #define SK_DISABLE_LOWP_BILERP_CLAMP_CLAMP_STAGE
-#define SK_DISABLE_NEXT_BATCH_OF_LOWP_STAGES
 
 ///////////////////////// Imported from BUILD.gn and skia_common.gypi