Revert "Automatically trigger installation of high-quality speech synthesis extension."

chrome/common/pref_names.cc

Index: chrome/common/pref_names.cc
diff --git a/chrome/common/pref_names.cc b/chrome/common/pref_names.cc
index e0645b39300274cb27cf4bba0a64db2e3d67e23b..368d6a8e27fec480707c156668269af6de077e14 100644
--- a/chrome/common/pref_names.cc
+++ b/chrome/common/pref_names.cc
@@ -880,11 +880,6 @@ const char kMultiProfileNotificationDismissed[] =
 // for more details of the valid values.
 const char kMultiProfileUserBehavior[] = "settings.multiprofile_user_behavior";
 
-// List of the set of language codes for which high quality local speech
-// synthesis has been enabled.
-const char kHighQualitySpeechSynthesisLanguages[] =
-    "settings.speech_synthesis.high_quality_languages";
-
 // A boolean preference indicating whether user has seen first-run tutorial
 // already.
 const char kFirstRunTutorialShown[] = "settings.first_run_tutorial_shown";