Remove useless in_array

It's always going to be either true or false. There are no other options.

Signed-off-by: Kamil Tekiela <tekiela246@gmail.com>

phpstan-baseline.neon

@@ -10580,11 +10580,6 @@ parameters:
 			count: 1
 			path: src/Font.php
 
-		-
-			message: "#^Call to function in_array\\(\\) requires parameter \\#3 to be set\\.$#"
-			count: 1
-			path: src/Footer.php
-
 		-
 			message: "#^Construct empty\\(\\) is not allowed\\. Use more strict comparison\\.$#"
 			count: 4

src/Footer.php

@@ -141,7 +141,7 @@ class Footer
 
         $params['server'] = $GLOBALS['server'];
 
-        if (isset($_REQUEST['single_table']) && in_array($_REQUEST['single_table'], [true, false])) {
+        if (isset($_REQUEST['single_table'])) {
             $params['single_table'] = $_REQUEST['single_table'];
         }