Remove old webui History page on desktop and mobile

chrome/common/chrome_features.cc

Index: chrome/common/chrome_features.cc
diff --git a/chrome/common/chrome_features.cc b/chrome/common/chrome_features.cc
index 896f16f2c0cc9092e3ccda644422c2f30a18891d..9ce872b45f51b7bf3c788a8c66106bc17ebeb93b 100644
--- a/chrome/common/chrome_features.cc
+++ b/chrome/common/chrome_features.cc
@@ -190,10 +190,6 @@ extern const base::Feature kAcknowledgeNtpOverrideOnDeactivate{
     "AcknowledgeNtpOverrideOnDeactivate", base::FEATURE_DISABLED_BY_DEFAULT};
 #endif
 
-// Enables or disables the Material Design version of chrome://history.
-const base::Feature kMaterialDesignHistory{"MaterialDesignHistory",
-                                           base::FEATURE_ENABLED_BY_DEFAULT};
-
 // The material redesign of the Incognito NTP.
 const base::Feature kMaterialDesignIncognitoNTP{
     "MaterialDesignIncognitoNTP", base::FEATURE_DISABLED_BY_DEFAULT};