Revert "Add logic for zoom toggle"

This reverts commit 2f35b1c6.

javascript/imageviewer.js

@@ -80,17 +80,6 @@ function showGalleryImage(){
     }, 100);
 }
 
-function modalZoomToggle(event){
-    modalImage = gradioApp().getElementById("modalImage");
-    console.log(modalImage)
-    if( !modalImage.classList.contains('modalImageFullscreen') ){
-        modalImage.classList.add('modalImageFullscreen');
-    }else{
-        modalImage.classList.remove('modalImageFullscreen');
-    }
-    event.stopPropagation()
-}
-
 function galleryImageHandler(e){
     if(e && e.parentElement.tagName == 'BUTTON'){
         e.onclick = showGalleryImage;
@@ -108,22 +97,16 @@ document.addEventListener("DOMContentLoaded", function() {
     const modalFragment = document.createDocumentFragment();
     const modal = document.createElement('div')
     modal.onclick = closeModal;
-    modal.id = "lightboxModal";
-    modal.tabIndex=0
-    modal.addEventListener('keydown', modalKeyHandler, true)
-
+    
     const modalClose = document.createElement('span')
     modalClose.className = 'modalClose cursor';
     modalClose.innerHTML = '×'
     modalClose.onclick = closeModal;
+    modal.id = "lightboxModal";
+    modal.tabIndex=0
+    modal.addEventListener('keydown', modalKeyHandler, true)
     modal.appendChild(modalClose)
 
-    const modalZoom = document.createElement('span')
-    modalZoom.className = 'modalZoom cursor';
-    modalZoom.innerHTML = '⤡'
-    modalZoom.addEventListener('click', modalZoomToggle, true)
-    modal.appendChild(modalZoom)
-
     const modalImage = document.createElement('img')
     modalImage.id = 'modalImage';
     modalImage.onclick = closeModal;