Remove 8.3.99

Author: VincentLanglet

.github/workflows/build.yml

@@ -43,10 +43,6 @@ jobs:
       - name: "Validate Composer"
         run: "composer validate"
 
-      - name: "Allow installing on PHP 8.4"
-        if: matrix.php-version == '8.4'
-        run: "composer config platform.php 8.3.99"
-
       - name: "Install dependencies"
         run: "composer install --no-interaction --no-progress"