Revert of Support different Google attestation (Privacy CA) servers.

chromeos/chromeos_switches.cc

Index: chromeos/chromeos_switches.cc
diff --git a/chromeos/chromeos_switches.cc b/chromeos/chromeos_switches.cc
index d392adbb66dfa9aec1592bb9b0f68d0b7cf47fc1..564105ced27fe9278eb4c463c4fcfe03c6a92806 100644
--- a/chromeos/chromeos_switches.cc
+++ b/chromeos/chromeos_switches.cc
@@ -412,9 +412,6 @@
 // Enables testing for auto update UI.
 const char kTestAutoUpdateUI[] = "test-auto-update-ui";
 
-// Determines which Google Privacy CA to use for attestation.
-const char kAttestationServer[] = "attestation-server";
-
 // Enables wake on wifi packet feature, which wakes the device on the receipt
 // of network packets from whitelisted sources.
 const char kWakeOnWifiPacket[] = "wake-on-wifi-packet";