Remove ledger code from Chrome

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 1b24991b7b10d2e8b7d33f7e4ceb5adf1ccd964a..61a944723593cb9b3f7966709cbae5058978cf75 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -771,14 +771,6 @@ const char kKioskMode[]                     = "kiosk";
 // See http://crbug.com/31395.
 const char kKioskModePrinting[]             = "kiosk-printing";
 
-// Address for the ledger (Copresence) server.
-// Ledger is deprecated; use the chrome.copresence API instead.
-const char kLedgerServer[]                  = "ledger-server";
-
-// Tracing token for calls to the ledger (Copresence) server.
-// Ledger is deprecated; use the chrome.copresence API instead.
-const char kLedgerTracingToken[]            = "ledger-tracing-token";
-
 // Causes Chrome to attempt to get metadata from the webstore for the
 // given item, and then prompt the user to download and install it.
 const char kLimitedInstallFromWebstore[]    = "limited-install-from-webstore";