Stop building PHP 7 images. #31

Job	Run time
build-images (eksponent/php8, php8, Dockerfile-8-0-fpm, 8-0-fpm)	30m 13s
build-images (eksponent/php8, php8, Dockerfile-8-1-fpm, 8-1-fpm)	37m 34s
build-images (eksponent/php8, php8, Dockerfile-8-2-fpm, 8-2-fpm)	38m 52s
build-images (eksponent/php8, php8, Dockerfile-8-3-fpm, 8-3-fpm)	41m 21s
build-images (eksponent/php-with-supervisor-for-workers, php-with-supervisor-for-workers, Dockerf...	32m 5s
build-images (eksponent/php-with-supervisor-for-workers, php-with-supervisor-for-workers, Dockerf...	39m 37s
build-images (eksponent/php-with-supervisor-for-workers, php-with-supervisor-for-workers, Dockerf...	42m 6s
build-images (eksponent/php-with-supervisor-for-workers, php-with-supervisor-for-workers, Dockerf...	42m 42s
	5h 4m 30s

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