Added removeParameter function that can remove a query parameter from the route.

ignite-html-router.js

@@ -472,6 +472,24 @@ class Router {
             return (params.has(name) ? params.get(name) : null);
         }
     }
+
+    /**
+     * Removes a query parameter from the route search if it exists.
+     * @param {String} name 
+     */
+    static removeParameter(name) {
+        if (Router.hashMode) {
+            var params = new URLSearchParams(window.location.hash.includes("?") ? "?" + window.location.hash.split("?")[1] : "");
+            if (params.has(name)) {
+                params.delete(name);
+                window.location.hash = window.location.hash.split("?")[0] + "?" + params.toString();
+            }
+        } else {
+            var url = new URL(window.location);
+            url.searchParams.delete(name);
+            window.history.pushState(null, '', url.toString());
+        }
+    }
 }
 
 Router.states = [];