Remove the MSAA path renderer

Bug: skia:
Change-Id: Ib18bede613c8d27fd6326f655dc2d638e35870ff
Reviewed-on: https://skia-review.googlesource.com/123726
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
diff --git a/tools/flags/SkCommonFlags.cpp b/tools/flags/SkCommonFlags.cpp
index b1c6e67..9065607 100644
--- a/tools/flags/SkCommonFlags.cpp
+++ b/tools/flags/SkCommonFlags.cpp
@@ -163,7 +163,7 @@
 
 DEFINE_string(pr, "default",
               "Set of enabled gpu path renderers. Defined as a list of: "
-              "[[~]all [~]default [~]dashline [~]nvpr [~]msaa [~]aaconvex "
+              "[~]all [~]default [~]dashline [~]nvpr [~]aaconvex "
               "[~]aalinearizing [~]small [~]tess]");
 
 void SetCtxOptionsFromCommonFlags(GrContextOptions* ctxOptions) {