fix: remove SOAP extension installation in pipeline

SOAP PHP extension is already available in image used to build projects
(and is based on debian). We need to remove this part to be compatible
with apt-based distro.

Signed-off-by: Bart Jaskulski <bjaskulski@protonmail.com>

includes/prepare.yml

@@ -15,8 +15,6 @@ prepare prefixed vendor:
   script:
     - echo ${WPDESK_CI_VERSION}
     - php --version
-    - apk update && apk upgrade && apk add git libxml2-dev
-    - docker-php-ext-install soap
     - composer install
 
 prepare npm assets: