Bin superfluous returnToDir logic

This was initially introduced in OC so that we know which directory to
go after we close the editor but this seems unnecessary here in NC as
richdocuments is just an iframe which is removed from DOM when we close
the document.

js/documents.js

@@ -72,7 +72,6 @@ var documentsMain = {
 	loadErrorHint : '',
 	renderComplete: false, // false till page is rendered with all required data about the document(s)
 	toolbar : '<div id="ocToolbar"><div id="ocToolbarInside"></div><span id="toolbar" class="claro"></span></div>',
-	returnToDir : null, // directory where we started from in the 'Files' app
 
 	UI : {
 		/* Editor wrapper HTML */
@@ -268,12 +267,8 @@ var documentsMain = {
 								documentsMain.UI.notify(t('richdocuments', 'Failed to revert the document to older version'));
 							}
 
-							// generate file id with returnToDir information in it, if any
-							var fileid = e.currentTarget.parentElement.dataset.fileid.replace(/_.*/, '') +
-							    (documentsMain.returnToDir ? '_' + documentsMain.returnToDir : '');
-
 							// load the file again, it should get reverted now
-							window.location = OC.generateUrl('apps/richdocuments/index#{fileid}', {fileid: fileid});
+							window.location = OC.generateUrl('apps/richdocuments/index#{fileid}', {fileid: e.currentTarget.parentElement.dataset.fileid});
 							window.location.reload();
 							documentsMain.overlay.documentOverlay('hide');
 						}
@@ -426,11 +421,6 @@ var documentsMain = {
 		// Does anything indicate that we need to autostart a session?
 		fileId = getURLParameter('fileid').replace(/^\W*/, '');
 
-		if (fileId.indexOf('_') >= 0) {
-			documentsMain.returnToDir = unescape(fileId.replace(/^[^_]*_/, ''));
-			fileId = fileId.replace(/_.*/, '');
-		}
-
 		documentsMain.show(fileId);
 
 		if (fileId) {

js/viewer/viewer.js

@@ -77,7 +77,7 @@ var odfViewer = {
 			);
 		} else {
 			viewer = OC.generateUrl(
-				'apps/richdocuments/index?fileId={fileId}_{dir}&requesttoken={requesttoken}',
+				'apps/richdocuments/index?fileId={fileId}&requesttoken={requesttoken}',
 				{
 					fileId: fileId,
 					dir: fileDir,