Remove --no-use-mus-in-renderer

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 16256d7c1d8e3e66eedd29c76bdfc286084f0cd4..be4ed50abe8da39eb78f6035bdc8d9e29818186a 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -657,9 +657,6 @@ const char kNoReferrers[]                   = "no-referrers";
 // Disables the sandbox for all process types that are normally sandboxed.
 const char kNoSandbox[]                     = "no-sandbox";
 
-// Do not use the mojo UI Service in the Chrome render process.
-const char kNoUseMusInRenderer[] = "no-use-mus-in-renderer";
-
 // Disables the use of a zygote process for forking child processes. Instead,
 // child processes will be forked and exec'd directly. Note that --no-sandbox
 // should also be used together with this flag because the sandbox needs the