Remove function exists around env function

.php-cs-fixer.cache

@@ -0,0 +1 @@
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src/helpers.php

@@ -2,34 +2,32 @@
 
 declare(strict_types=1);
 
-if (!function_exists('env')) {
-    function env(string $key, mixed $default = null): mixed
-    {
-        $value = $_ENV[$key] ?? false;
+function env(string $key, mixed $default = null): mixed
+{
+    $value = $_ENV[$key] ?? false;
 
-        if ($value === false) {
-            return $default;
-        }
-
-        switch (strtolower($value)) {
-            case 'true':
-            case '(true)':
-                return true;
-            case 'false':
-            case '(false)':
-                return false;
-            case 'empty':
-            case '(empty)':
-                return '';
-            case 'null':
-            case '(null)':
-                return null;
-        }
+    if ($value === false) {
+        return $default;
+    }
 
-        if (preg_match('/\A([\'"])(.*)\1\z/', $value, $matches)) {
-            return $matches[2];
-        }
+    switch (strtolower($value)) {
+        case 'true':
+        case '(true)':
+            return true;
+        case 'false':
+        case '(false)':
+            return false;
+        case 'empty':
+        case '(empty)':
+            return '';
+        case 'null':
+        case '(null)':
+            return null;
+    }
 
-        return $value;
+    if (preg_match('/\A([\'"])(.*)\1\z/', $value, $matches)) {
+        return $matches[2];
     }
+
+    return $value;
 }