A few cosmetic changes

Author: xepozz

src/Renderer/HtmlRenderer.php

@@ -261,7 +261,6 @@ public function renderCallStack(Throwable $t, array $trace = []): string
             $index = 0;
         }
 
-        $length = count($trace);
         foreach ($trace as $traceItem) {
             $file = !empty($traceItem['file']) ? $traceItem['file'] : null;
             $line = !empty($traceItem['line']) ? $traceItem['line'] : null;
@@ -601,7 +600,7 @@ private function groupVendorCallStackItems(array $items): array
             $groupedItems[$groupIndex][$index] = $item;
         }
 
-        /** @psalm-var array<int, array<int, string>> $groupedItems It's need for Psalm <=4.30 only. */
+        /** @psalm-var array<int, array<int, string>> $groupedItems It's needed for Psalm <=4.30 only. */
 
         return $groupedItems;
     }