allow to add dependencies and php extensions into the Nextcloud container

Signed-off-by: Simon L <szaimen@e.mail.de>

Containers/nextcloud/Dockerfile

@@ -64,13 +64,11 @@ RUN set -ex; \
     pecl install APCu-5.1.22; \
     pecl install memcached-3.2.0; \
     pecl install redis-5.3.7; \
-    pecl install imagick-3.7.0; \
     \
     docker-php-ext-enable \
         apcu \
         memcached \
         redis \
-        imagick \
     ; \
     rm -r /tmp/pear; \
     \