Revert "options.json: add PHP 7.4"

This reverts commit 228d58d.

Author: lukareihl

ci/options.json

@@ -46,21 +46,5 @@
       "LanguageVersion": "8.0",
       "RunPerformance": true,
       "PackageRequirement": true
-    },
-    {
-      "Name": "Ubuntu_PHP_7.4",
-      "Image": "ubuntu-latest",
-      "Language": "php",
-      "LanguageVersion": "7.4",
-      "RunPerformance": true,
-      "PackageRequirement": true
-    },
-    {
-      "Name": "macOS_PHP_7.4",
-      "Image": "macos-latest",
-      "Language": "php",
-      "LanguageVersion": "7.4",
-      "RunPerformance": true,
-      "PackageRequirement": true
     }
 ]