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 ea067f44564626c1700387d0f3d3b128d392e57f..486b530802dce6196f2220c858c837c1750f634b 100644
--- a/chrome/common/chrome_features.cc
+++ b/chrome/common/chrome_features.cc
@@ -188,10 +188,6 @@ 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};