remove public class field declarations

res/include/script/file_viewer/viewer_scripts/AudioViewer.js

@@ -1,13 +1,4 @@
 class AudioViewer {
-	viewer = null;
-	file   = null;
-	next   = null;
-
-	container = null;
-	icon      = null;
-	element   = null;
-	source    = null;
-
 	constructor(viewer, file, next) {let v = this;
 		v.viewer = viewer;
 		v.file   = file;

res/include/script/file_viewer/viewer_scripts/FileViewer.js

@@ -1,10 +1,4 @@
 class FileViewer {
-	viewer = null;
-	file   = null;
-
-	container = null;
-	icon      = null;
-
 	constructor(viewer, file, next) {let v = this;
 		v.viewer = viewer;
 		v.file   = file;

res/include/script/file_viewer/viewer_scripts/ImageViewer.js

@@ -1,18 +1,11 @@
 class ImageViewer {
-	viewer = null;
-	file   = null;
-
-	container = null;
-	element   = null;
-
-	zoomed = false;
-	x = 0;
-	y = 0;
-	dragging = false;
-
 	constructor(viewer, file) {let v = this;
-		v.viewer = viewer;
-		v.file   = file;
+		v.viewer   = viewer;
+		v.file     = file;
+		v.zoomed   = false;
+		v.x        = 0;
+		v.y        = 0;
+		v.dragging = false;
 
 		v.container = document.createElement("dv");
 		v.container.classList = "image-container";

res/include/script/file_viewer/viewer_scripts/PDFViewer.js

@@ -1,8 +1,4 @@
 class PDFViewer {
-	viewer = null;
-	file   = null;
-	container = null;
-
 	constructor(viewer, file) {let v = this;
 		v.viewer = viewer;
 		v.file   = file;

res/include/script/file_viewer/viewer_scripts/TextViewer.js

@@ -1,14 +1,9 @@
 class TextViewer {
-	viewer = null;
-	file   = null;
-
-	container = null;
-	pre       = null;
-	prettyprint = null;
-
 	constructor(viewer, file) {let v = this;
-		v.viewer = viewer;
-		v.file   = file;
+		v.viewer      = viewer;
+		v.file        = file;
+		v.pre         = null;
+		v.prettyprint = null;
 
 		v.container = document.createElement("div");
 		v.container.classList = "text-container";

res/include/script/file_viewer/viewer_scripts/VideoViewer.js

@@ -1,12 +1,4 @@
 class VideoViewer {
-	viewer = null;
-	file   = null;
-	next   = null;
-
-	vidContainer = null;
-	vidElement   = null;
-	videoSource  = null;
-
 	constructor(viewer, file, next) {let v = this;
 		v.viewer = viewer;
 		v.file   = file;