also remove a from_calculation flag which was scheduled for removal i…

…n Psalm 5

src/Psalm/Internal/Analyzer/Statements/Expression/Call/Method/MethodCallReturnTypeFetcher.php

@@ -108,7 +108,7 @@ public static function fetch(
             if ($premixin_method_id->fq_class_name === PDOException::class) {
                 return Type::getString();
             } else {
-                return Type::getInt(true); // TODO: Remove the flag in Psalm 5
+                return Type::getInt();
             }
         }