main/mcpp: remove aport

There hasn't been a new release since 2008.

See also: #11402
7 jobs for !6904 with remove-mcpp in 1 minute and 55 seconds (queued for 1 second)
latest detached
Status Job ID Name Coverage
  Lint
passed #95212
docker-alpine x86_64
lint

00:00:21

 
  Build
passed #95217
docker-alpine ci-build aarch64
build-aarch64

00:00:39

passed #95218
docker-alpine ci-build armv7
build-armv7

00:00:52

passed #95216
docker-alpine ci-build ppc64le
build-ppc64le

00:00:56

passed #95215
docker-alpine ci-build s390x
build-s390x

00:00:30

passed #95214
docker-alpine ci-build x86
build-x86

00:00:31

passed #95213
docker-alpine ci-build x86_64
build-x86_64

00:00:32