removed unused retrieveWorkoutImages() function from gallery.js

frontend/www/scripts/gallery.js

 let goBackButton;
 
-async function retrieveWorkoutImages(id) {  
-    let workoutData = null;
-    const response = await sendRequest("GET", `${HOST}/api/workouts/${id}/`);
-    if (!response.ok) {
-        const data = await response.json();
-        const alert = createAlert("Could not retrieve workout data!", data);
-        document.body.prepend(alert);
-    } else {
-        workoutData = await response.json();
-
-        document.getElementById("workout-title").innerHTML = `Workout name: ${workoutData.name}`;
-        document.getElementById("workout-owner").innerHTML = `Owner: ${workoutData.owner_username}`;
-
-        const hasNoImages = workoutData.files.length == 0;
-        const noImageText = document.querySelector("#no-images-text");
-
-        if(hasNoImages){
-            noImageText.classList.remove("hide");
-            return;
-        }
-
-        noImageText.classList.add("hide");
-
-        
-        const filesDiv = document.getElementById("img-collection");
-        const filesDeleteDiv = document.getElementById("img-collection-delete");
-        
-        const currentImageFileElement = document.querySelector("#current");
-        let isFirstImg = true;
-
-        let fileCounter = 0;
-
-        for (const file of workoutData.files) {
-            const a = document.createElement("a");
-            a.href = file.file;
-            const pathArray = file.file.split("/");
-            a.text = pathArray[pathArray.length - 1];
-            a.className = "me-2";
-
-            
-
-            const isImage = ["jpg", "png", "gif", "jpeg", "JPG", "PNG", "GIF", "JPEG"].includes(a.text.split(".")[1]);
-
-            if(isImage){
-                const deleteImgButton = document.createElement("input");
-                deleteImgButton.type = "button";
-                deleteImgButton.className = "btn btn-close";
-                deleteImgButton.id = file.url.split("/")[file.url.split("/").length - 2];
-                deleteImgButton.addEventListener('click', () => handleDeleteImgClick(deleteImgButton.id, "DELETE", `Could not delete workout ${deleteImgButton.id}!`, HOST, ["jpg", "png", "gif", "jpeg", "JPG", "PNG", "GIF", "JPEG"]));
-                filesDeleteDiv.appendChild(deleteImgButton);
-                
-                const img = document.createElement("img");
-                img.src = file.file;
-                
-                filesDiv.appendChild(img);
-                deleteImgButton.style.left = `${(fileCounter % 4) * 191}px`;
-                deleteImgButton.style.top = `${Math.floor(fileCounter / 4) * 105}px`;
-
-                if(isFirstImg){
-                    currentImageFileElement.src = file.file;
-                    isFirstImg = false;
-                }
-                fileCounter++;
-            }
-        }
-
-        const otherImageFileElements = document.querySelectorAll(".imgs img");
-        const selectedOpacity = 0.6;
-        otherImageFileElements[0].style.opacity = selectedOpacity;
-
-        otherImageFileElements.forEach((imageFileElement) => imageFileElement.addEventListener("click", (event) => {
-            //Changes the main image
-            currentImageFileElement.src = event.target.src;
-
-            //Adds the fade animation
-            currentImageFileElement.classList.add('fade-in')
-            setTimeout(() => currentImageFileElement.classList.remove('fade-in'), 500);
-
-            //Sets the opacity of the selected image to 0.4
-            otherImageFileElements.forEach((imageFileElement) => imageFileElement.style.opacity = 1)
-            event.target.style.opacity = selectedOpacity;
-        }))
-
-    }
-    return workoutData;     
-}
-
-async function validateImgFileType(id, host_variable, acceptedFileTypes) {
-    const file = await sendRequest("GET", `${host_variable}/api/workout-files/${id}/`);
-    const fileData = await file.json();
-    const fileType = fileData.file.split("/")[fileData.file.split("/").length - 1].split(".")[1];
-    
-    return acceptedFileTypes.includes(fileType);
-}
-
-async function handleDeleteImgClick (id, http_keyword, fail_alert_text, host_variable, acceptedFileTypes) {
-    
-    if(validateImgFileType(id, host_variable, acceptedFileTypes, )){
-        return
-    }
-
-    const response = await sendRequest(http_keyword, `${host_variable}/api/workout-files/${id}/`);
-
-    if (!response.ok) {
-        const data = await response.json();
-        const alert = createAlert(fail_alert_text, data);
-        document.body.prepend(alert);
-    } else {
-        location.reload();
-    }
-}
-
 function handleGoBackToWorkoutClick() {
     const urlParams = new URLSearchParams(window.location.search);
     const id = urlParams.get('id');
@@ -121,6 +9,6 @@ function handleGoBackToWorkoutClick() {
 window.addEventListener("DOMContentLoaded", async () => {
 
     goBackButton = document.querySelector("#btn-back-workout");
-    goBackButton.addEventListener('click', handleGoBackToWorkoutClick); 
+    goBackButton.addEventListener('click', handleGoBackToWorkoutClick);
 
-});
\ No newline at end of file
+});