refactor(router): Manually implement trailing slash clipper

src/router.rs

···
   },
   module::{AsyncModule, Module},
   response::Response,
+  utilities,
 };
 
 macro_rules! block {
···
   #[allow(
     clippy::too_many_lines,
     clippy::needless_pass_by_ref_mut,
-    clippy::significant_drop_in_scrutinee
+    clippy::significant_drop_in_scrutinee,
+    clippy::cognitive_complexity
   )]
   async fn handle(
     &mut self,
···
     }
 
     let fixed_path = if self.fix_path {
-      self
-        .routes
-        .fix_path(url.path())
-        .unwrap_or_else(|| url.path().to_string())
+      utilities::normalize_path_slashes(url.path())
     } else {
       url.path().to_string()
     };

src/utilities.rs

···
     .map(|(k, v)| (k.to_string(), v.to_string()))
     .collect()
 }
+
+/// Normalizes a path by removing all trailing slashes, unless it's the root
+/// path "/".
+///
+/// # Examples
+///
+/// ```rust
+/// assert_eq!(
+///   windmark::utilities::normalize_path_slashes("/foo///"),
+///   "/foo"
+/// );
+/// assert_eq!(windmark::utilities::normalize_path_slashes("/foo/"), "/foo");
+/// assert_eq!(windmark::utilities::normalize_path_slashes("/foo"), "/foo");
+/// assert_eq!(windmark::utilities::normalize_path_slashes("/"), "/");
+/// ```
+#[must_use]
+pub fn normalize_path_slashes(path: &str) -> String {
+  if path == "/" {
+    return "/".to_string();
+  }
+
+  if path.ends_with('/') {
+    path.trim_end_matches('/').to_string()
+  } else {
+    path.to_string()
+  }
+}