Revert 101581 - Add --use-more-webui runtime flag to toggle WebUI replacements for native dialogs.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
===================================================================
--- chrome/common/chrome_switches.cc	(revision 101584)
+++ chrome/common/chrome_switches.cc	(working copy)
@@ -1000,10 +1000,6 @@
 // Runs un-installation steps that were done by chrome first-run.
 const char kUninstall[]                     = "uninstall";
 
-// Use WebUI versions of dialogs when available (rather than platform native
-// implementations).
-const char kUseMoreWebUI[]                  = "use-more-webui";
-
 // Use a pure Views implementation when available (rather rather than platform
 // native implementation such as GTK).
 const char kUsePureViews[]                  = "use-pure-views";