Revert "bug #46327 [HttpKernel] Allow ErrorHandler ^5.0 to be used in HttpKernel 4.4 (mpdude)"

This reverts commit 1e317ccd651085920e4eb4a68f3eb4aaef066ed9, reversing
changes made to 129a2710e6c884bdbed77eb18760904455633ce7.

Author: nicolas-grekas

composer.json

@@ -17,7 +17,7 @@
     ],
     "require": {
         "php": ">=7.1.3",
-        "symfony/error-handler": "^4.4|^5.0",
+        "symfony/error-handler": "^4.4",
         "symfony/event-dispatcher": "^4.4",
         "symfony/http-client-contracts": "^1.1|^2",
         "symfony/http-foundation": "^4.4.30|^5.3.7",