When classmap authoratative is enabled, there should be no reason to load 3 files, and process them when autoloader will return false

src/Composer/Autoload/AutoloadGenerator.php

@@ -544,6 +544,7 @@ class ComposerAutoloaderInit$suffix
 
 HEADER;
 
+        if (!$this->classMapAuthoritative) {
             if ($useIncludePath) {
                 $file .= <<<'INCLUDE_PATH'
             $includePaths = require __DIR__ . '/include_paths.php';
@@ -571,6 +572,7 @@ PSR0;
 
 
 PSR4;
+        }
 
         if ($useClassMap) {
             $file .= <<<'CLASSMAP'