Drop all Scrutinizer annotations

Because they tend to clutter our code a lot and unfortunately, there are
lots of false positives. Instead, it would probably be better to deal
with false positives out of band, via the Scrutinizer web UI.

tests/PhpSpreadsheetTests/Writer/Xlsx/MemoryDrawingTest.php

@@ -56,7 +56,7 @@ class MemoryDrawingTest extends AbstractFunctional
                 if ($gdImage === false) {
                     self::fail('unexpected failure in imagecreatefromstring');
                 } else {
-                    self::assertTrue(self::checkTransparent(/** @scrutinizer ignore-type */ $gdImage));
+                    self::assertTrue(self::checkTransparent($gdImage));
                 }
             } else {
                 self::fail('Unexpected drawing not in Drawing class');