Revert "PMCORE-3855 (pull request #8484)"

composer.json

@@ -58,7 +58,7 @@
         "laravel/tinker": "^1.0",
         "league/oauth2-client": "^2.4",
         "league/oauth2-google": "^3.0",
-        "tecnickcom/tcpdf": "6.4.*",
+        "tecnickcom/tcpdf": "6.3.*",
         "fzaninotto/faker": "^1.7",
         "predis/predis": "1.1.1",
         "phpmyadmin/sql-parser": "^5.3",
@@ -128,11 +128,5 @@
                 "bootstrap/classaliasmap.php"
             ]
         }
-    },
-    "config": {
-        "allow-plugins": {
-            "kylekatarnls/update-helper": true,
-            "typo3/class-alias-loader": true
-        }
     }
 }