Remove the RC4 field trial.

components/ssl_config/ssl_config_service_manager_pref.cc

Index: components/ssl_config/ssl_config_service_manager_pref.cc
diff --git a/components/ssl_config/ssl_config_service_manager_pref.cc b/components/ssl_config/ssl_config_service_manager_pref.cc
index af1cd0939297658a92c2a2266974f36fdc10e9ca..fe1e2434cbecbf6b06958c24c3431c80f6d118ae 100644
--- a/components/ssl_config/ssl_config_service_manager_pref.cc
+++ b/components/ssl_config/ssl_config_service_manager_pref.cc
@@ -11,8 +11,8 @@
 
 #include "base/bind.h"
 #include "base/feature_list.h"
+#include "base/location.h"
 #include "base/macros.h"
-#include "base/metrics/field_trial.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_util.h"
 #include "base/values.h"
@@ -83,12 +83,6 @@ uint16_t SSLProtocolVersionFromString(const std::string& version_str) {
   return version;
 }
 
-bool IsRC4EnabledByDefault() {
-  const std::string group_name =
-      base::FieldTrialList::FindFullName("RC4Ciphers");
-  return base::StartsWith(group_name, "Enabled", base::CompareCase::SENSITIVE);
-}
-
 const base::Feature kSSLVersionFallbackTLSv11 {
     "SSLVersionFallbackTLSv1.1", base::FEATURE_DISABLED_BY_DEFAULT,
 };
@@ -198,10 +192,6 @@ SSLConfigServiceManagerPref::SSLConfigServiceManagerPref(
       io_task_runner_(io_task_runner) {
   DCHECK(local_state);
 
-  local_state->SetDefaultPrefValue(
-      ssl_config::prefs::kRC4Enabled,
-      new base::FundamentalValue(IsRC4EnabledByDefault()));
-
   // Restore the TLS 1.1 fallback leg if enabled via features.
   // TODO(davidben): Remove this when the fallback removal has succeeded.
   // https://crbug.com/536200.