Remove readline-dev from checkdepends

Crystal stdlib doesn't have libreadline bindings included since 0.32.0
7 jobs for !16162 with patch-3 in 35 minutes and 10 seconds (queued for 1 second)
detached
Status Job ID Name Coverage
  Lint
failed #289494
docker-alpine x86_64 allowed to fail
lint

00:00:18

 
  Build
failed #289499
docker-alpine ci-build aarch64
build-aarch64

00:34:38

failed #289500
docker-alpine ci-build armv7
build-armv7

00:00:11

passed #289498
docker-alpine ci-build ppc64le
build-ppc64le

00:00:55

passed #289497
docker-alpine ci-build s390x
build-s390x

00:00:26

passed #289496
docker-alpine ci-build x86
build-x86

00:00:30

failed #289495
x86_64 docker-alpine ci-build
build-x86_64

00:13:55

 
Name Stage Failure
failed
build-x86_64 Build
No job log
failed
build-armv7 Build
No job log
failed
lint Lint
No job log
failed
build-aarch64 Build
No job log