Remove hhvm-autload, but retain 4.102 compatibility

Author: hershel-theodore-layton

composer.dev.json

@@ -7,16 +7,11 @@
     "hershel-theodore-layton/sgml-stream": "dev-master || ^2"
   },
   "require-dev": {
-    "hhvm/hhvm-autoload": "^3.2",
     "hershel-theodore-layton/portable-hack-ast-linters-server": "<1"
   },
   "scripts": {
-    "post-install-cmd": [
-      ".github/workflows/prepare-environment.sh"
-    ],
-    "post-update-cmd": [
-      ".github/workflows/prepare-environment.sh"
-    ]
+    "post-install-cmd": [".github/workflows/prepare-environment.sh"],
+    "post-update-cmd": [".github/workflows/prepare-environment.sh"]
   },
   "config": {
     "allow-plugins": {

composer.json

@@ -6,9 +6,7 @@
     "hhvm": "^4.102",
     "hershel-theodore-layton/sgml-stream": "dev-master || ^2"
   },
-  "require-dev": {
-    "hhvm/hhvm-autoload": "^3.2"
-  },
+  "require-dev": {},
   "scripts": {
     "post-install-cmd": [
       ".github/workflows/prepare-environment.sh"