Remove unneeded file

apps/encryption/js/detect-migration.js

-/**
- * Copyright (c) 2013
- *  Bjoern Schiessle <schiessle@owncloud.com>
- * This file is licensed under the Affero General Public License version 3 or later.
- * See the COPYING-README file.
- */
-
-
-$(document).ready(function(){
-	$('form[name="login"]').on('submit', function() {
-		var user = $('#user').val();
-		var password = $('#password').val();
-		$.ajax({
-			type: 'POST',
-			url: OC.linkTo('files_encryption', 'ajax/getMigrationStatus.php'),
-			dataType: 'json',
-			data: {user: user, password: password},
-			async: false,
-			success: function(response) {
-				if (response.data.migrationStatus === OC.Encryption.MIGRATION_OPEN) {
-					var message = t('files_encryption', 'Initial encryption started... This can take some time. Please wait.');
-					$('#messageText').text(message);
-					$('#message').removeClass('hidden').addClass('update');
-				} else if (response.data.migrationStatus === OC.Encryption.MIGRATION_IN_PROGRESS) {
-					var message = t('files_encryption', 'Initial encryption running... Please try again later.');
-					$('#messageText').text(message);
-					$('#message').removeClass('hidden').addClass('update');
-				}
-			}
-		});
-	});
-
-});