Go ahead trash it and see what happens. Be my guest.
/usr/sbin/systemkeychain
/System/Library/SyncServices/AutoRegistration/Schemas/com.apple.Keychain.syncsch ema
/System/Library/SyncServices/AutoRegistration/Clients/com.apple.Keychain
/Users/yourusername/Library/Keychains/login.keychain
/Library/Keychains/System.keychain
/System/Library/Keychains/SystemCACertificates.keychain
/System/Library/Keychains/SystemRootCertificates.keychain
/Users/yourusername/Library/Preferences/com.apple.keychainaccess.plist
/System/Library/LaunchDaemons/com.apple.systemkeychain.plist
/System/Library/Frameworks/SecurityInterface.framework/Versions/A/Resources/zh_T W.lproj/KeychainSettingsPanel.nib (and many more where these are.)
/Library/Keychains
/System/Library/Keychains
/Users/yourusername/Library/Keychains