Remove unused old script from homepage

index.hbs

@@ -41,56 +41,3 @@ into the {body} of the default.hbs template --}}
 
     </div>
 </main>
-
-
-{{!-- Scripts - Sticky behaviour for the header/nav when scrolling --}}
-<script>
-$(document).ready(function () {
-
-    var nav = document.querySelector('.site-nav-main .site-nav');
-    var feed = document.querySelector('.post-feed');
-
-    var lastScrollY = window.scrollY;
-    var lastWindowHeight = window.innerHeight;
-    var lastDocumentHeight = $(document).height();
-    var ticking = false;
-
-    function onScroll() {
-        lastScrollY = window.scrollY;
-        requestTick();
-    }
-
-    function onResize() {
-        lastWindowHeight = window.innerHeight;
-        lastDocumentHeight = $(document).height();
-        requestTick();
-    }
-
-    function requestTick() {
-        if (!ticking) {
-            requestAnimationFrame(update);
-        }
-        ticking = true;
-    }
-
-    function update() {
-        var trigger = feed.getBoundingClientRect().top + window.scrollY;
-        var progressMax = lastDocumentHeight - lastWindowHeight;
-
-        // show/hide nav
-        if (lastScrollY >= trigger - 20) {
-            nav.classList.add('fixed-nav-active');
-        } else {
-            nav.classList.remove('fixed-nav-active');
-        }
-
-        ticking = false;
-    }
-
-    window.addEventListener('scroll', onScroll, { passive: true });
-    window.addEventListener('resize', onResize, false);
-
-    update();
-
-});
-</script>