Remove the flag to disable new hotwording.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index 94905fefc07d9709dc52e30e20b7816f8d493647..2084954a84dccffc4af00715f2293f0fe3df19b3 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -439,11 +439,6 @@ const char kEnhancedBookmarksExperiment[] = "enhanced-bookmarks-experiment";
 const char kEnableEphemeralAppsInWebstore[] =
     "enable-ephemeral-apps-in-webstore";
 
-// Disables v2 hotword detection features. These features include
-// using a new component extension for performing hotword detection, new UI
-// flows, and always-on detection.
-const char kDisableExperimentalHotwording[] = "disable-experimental-hotwording";
-
 // Enables experimental hotword features specific to always-on.
 const char kEnableExperimentalHotwordHardware[] = "enable-hotword-hardware";