no more Composer 1 downgrade

doc/docker/development/Dockerfile

@@ -64,7 +64,6 @@ else \
 	RESULT=$?; \
 fi; \
 rm composer-setup.php; \
-composer.phar self-update --1; \
 exit $RESULT' \
 	# disable certificate checks for LDAP as most LDAP and AD servers have no "valid" cert
 	&& echo "TLS_REQCERT never" >> /etc/ldap/ldap.conf

doc/docker/fpm/Dockerfile

@@ -68,8 +68,6 @@ else \
 fi; \
 rm composer-setup.php; \
 exit $RESULT' \
-	# build EGroupware (Horde using a PEAR repo requires Composer v1)
-	&& composer.phar self-update --1 \
 	&& cd /usr/share \
 	&& [ $PHP_VERSION = "8.0" ] && COMPOSER_EXTRA=--ignore-platform-reqs || true \
 	&& composer.phar create-project $COMPOSER_EXTRA --prefer-dist --no-scripts --no-dev egroupware/egroupware:$VERSION \