Removes registration option on other servers

Change-Id: I628a5548564312a8f10fb0a62f1a4377f2c3ff2c

Author: awesome-michael

src/components/structures/auth/Registration.js

@@ -661,7 +661,6 @@ export default createReactClass({
                 <h2>{ _t('Create your account') }</h2>
                 { errorText }
                 { serverDeadSection }
-                { this.renderServerComponent() }
                 { this.renderRegisterComponent() }
                 { goBack }
                 { signIn }