Revert "working scroll restoration"

This reverts commit fa5a90b.

Author: birkskyum

packages/solid-router/src/Transitioner.tsx

@@ -36,19 +36,14 @@ export function Transitioner() {
   const previousIsPagePending = usePrevious(isPagePending)
 
   router.startTransition = (fn: () => void | Promise<void>) => {
-    // Execute fn synchronously to check if it returns a Promise
-    let result: void | Promise<void>
-    Solid.startTransition(() => {
-      result = fn()
-    })
-
-    // If fn returned a Promise, track the transition state
-    if (result! instanceof Promise) {
-      setIsTransitioning(true)
-      result.finally(() => {
+    setIsTransitioning(true)
+    Solid.startTransition(async () => {
+      try {
+        await fn()
+      } finally {
         setIsTransitioning(false)
-      })
-    }
+      }
+    })
   }
 
   // Subscribe to location changes