[PATCH 4/6] .travis.yml: Update the jobs to Ubuntu 22.04

[Thomas Huth]

According to our support policy, we'll soon drop our official support
for Ubuntu 20.04 ("Focal Fossa") in QEMU. Thus we should update the
Travis jobs now to a newer release (Ubuntu 22.04 - "Jammy Jellyfish")
for future testing. Since all jobs are using this release now, we
can drop the entries from the individual jobs and use the global
setting again.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 .travis.yml | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 8da88c4360..16cf706c07 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 os: linux
-dist: focal
+dist: jammy
 language: c
 compiler:
   - gcc
@@ -7,7 +7,7 @@ cache:
   # There is one cache per branch and compiler version.
   # characteristics of each job are used to identify the cache:
   # - OS name (currently only linux)
-  # - OS distribution (for Linux, bionic or focal)
+  # - OS distribution (e.g. "jammy" for Linux)
   # - Names and values of visible environment variables set in .travis.yml or 
Settings panel
   timeout: 1200
   ccache: true
@@ -81,7 +81,6 @@ jobs:
 
     - name: "[aarch64] GCC check-tcg"
       arch: arm64
-      dist: focal
       addons:
         apt_packages:
           - libaio-dev
@@ -117,7 +116,6 @@ jobs:
 
     - name: "[ppc64] GCC check-tcg"
       arch: ppc64le
-      dist: focal
       addons:
         apt_packages:
           - libaio-dev
@@ -152,7 +150,6 @@ jobs:
 
     - name: "[s390x] GCC check-tcg"
       arch: s390x
-      dist: focal
       addons:
         apt_packages:
           - libaio-dev
@@ -197,7 +194,6 @@ jobs:
 
     - name: "[s390x] GCC (other-system)"
       arch: s390x
-      dist: focal
       addons:
         apt_packages:
           - libaio-dev
@@ -227,7 +223,6 @@ jobs:
 
     - name: "[s390x] GCC (user)"
       arch: s390x
-      dist: focal
       addons:
         apt_packages:
           - libgcrypt20-dev
@@ -242,8 +237,7 @@ jobs:
 
     - name: "[s390x] Clang (disable-tcg)"
       arch: s390x
-      dist: focal
-      compiler: clang-10
+      compiler: clang
       addons:
         apt_packages:
           - libaio-dev
@@ -269,7 +263,6 @@ jobs:
           - libvdeplug-dev
           - libvte-2.91-dev
           - ninja-build
-          - clang-10
       env:
         - TEST_CMD="make check-unit"
         - CONFIG="--disable-containers --disable-tcg --enable-kvm 
--disable-tools
-- 
2.44.0