Revert "[Ubuntu] install libpcre1-8-0 for PHP compat (#4551)" (#4565)

This reverts commit 81d68d4.

Author: mikhailkoliada

images/linux/scripts/installers/php.sh

@@ -13,12 +13,6 @@ source $HELPER_SCRIPTS/install.sh
 apt-add-repository ppa:ondrej/php -y
 apt-get update
 
-# install specific version of libpcre2 otherwise latest ppa-hosted php fails
-# https://github.com/oerdnj/deb.sury.org/issues/1682
-if isUbuntu20 ; then
-    apt-get install -y libpcre2-8-0
-fi
-
 # Install PHP
 php_versions=$(get_toolset_value '.php.versions[]')