ci: remove pkg:epel-7 pkg:fedora-29 jobs

These jobs started to suddenly fail inexplicably. They also
require privileged mode and are a mess in general

Build and packaging for these distros is handled by nightly OBS builds
nowadays, so let's remove these.

Perhaps in the future, it might make sense ot bring back some sensible
CentOS 7 build (without the packaging part) to make sure we keep
compatibility with older GnuTLS on every commit / MR, instead of
nightly.
26 jobs for release-4-2-2 in 8 minutes and 48 seconds (queued for 8 seconds)
Status Job ID Name Coverage
  Build
passed #312165
amd64 linux docker
archive

00:00:39

passed #312166
amd64 linux docker
build

00:00:49

passed #312167
amd64 linux docker
build-asan

00:00:49

passed #312168
docker
kres-gen

00:00:47

 
  Test
passed #312169
docker delayed
build:darwin

00:00:38

passed #312170
amd64 linux docker
deckard

00:02:45

passed #312171
docker delayed
doc

00:01:21

passed #312172
dind
docker

00:02:10

passed #312173
docker delayed
lint:other

00:01:19

passed #312174
amd64 linux docker delayed
lint:pedantic

00:01:26

passed #312175
amd64 linux docker
lint:scan-build

00:02:41

passed #312176
amd64 linux docker
lint:tidy

00:03:30

passed #312177
amd64 linux docker
respdiff:basic

00:02:58

passed #312178
docker
root.hints

00:00:31

passed #312179
amd64 linux docker delayed
test:valgrind

00:02:29

 
  Extended
canceled #312181
respdiff
fwd-tls6-kresd.udp6

00:02:14

canceled #312182
respdiff
fwd-udp6-kresd.udp6

00:02:15

canceled #312186
respdiff
fwd-udp6-unbound.tcp6

00:02:15

canceled #312187
respdiff
fwd-udp6-unbound.tls6

00:02:16

canceled #312185
respdiff
fwd-udp6-unbound.udp6

00:02:17

canceled #312184
respdiff
iter.tls6

00:02:18

canceled #312183
respdiff
iter.udp6

00:02:20

passed #312180
amd64 linux docker
pytests

00:04:10

canceled #312188
respdiff
resperf:fwd-tls6.udp-asan

00:02:23

canceled #312189
respdiff
resperf:fwd-udp6.udp-asan

00:02:24

canceled #312190
respdiff
resperf:iter.udp-asan

00:02:24