remove TravisCI & Appveyor YAML

[jmckenna]

• related to Switch from Travis and AppVeyor to GitHub actions #274
• removes the TravisCI and Appveyor YAML files, as we have switched to GitHub Actions for Linux & Windows

[jbo-ads]

After so long time, it is good to finally disable these checks. Thanks @jmckenna !

[jbo-ads]

By the way, what about adding Ubuntu 22.04 and 24.04 to the list of checked OS?

[jmckenna]

@jbo-ads I was wondering that also - will try in another pull request, thanks!

[github-actions]

The backport to branch-1-14 failed:

The process '/usr/bin/git' failed with exit code 1

stderr

error: could not apply cc34db2... remove Travis & Appveyor YAML
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

stdout

CONFLICT (modify/delete): .travis.yml deleted in cc34db2 (remove Travis & Appveyor YAML) and modified in HEAD.  Version HEAD of .travis.yml left in tree.

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-branch-1-14 branch-1-14
# Navigate to the new working tree
cd .worktrees/backport-branch-1-14
# Create a new branch
git switch --create backport-333-to-branch-1-14
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick cc34db21041762c264b7492c9b1ddbd4fc467065,2aa93fd83e22b51801586fedff1b35cd777e46bb
# Push it to GitHub
git push --set-upstream origin backport-333-to-branch-1-14
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-branch-1-14

Then, create a pull request where the base branch is branch-1-14 and the compare/head branch is backport-333-to-branch-1-14.

[github-actions]

The backport to branch-1-12 failed:

The process '/usr/bin/git' failed with exit code 1

stderr

error: could not apply cc34db2... remove Travis & Appveyor YAML
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".

stdout

CONFLICT (modify/delete): .travis.yml deleted in cc34db2 (remove Travis & Appveyor YAML) and modified in HEAD.  Version HEAD of .travis.yml left in tree.

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-branch-1-12 branch-1-12
# Navigate to the new working tree
cd .worktrees/backport-branch-1-12
# Create a new branch
git switch --create backport-333-to-branch-1-12
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick cc34db21041762c264b7492c9b1ddbd4fc467065,2aa93fd83e22b51801586fedff1b35cd777e46bb
# Push it to GitHub
git push --set-upstream origin backport-333-to-branch-1-12
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-branch-1-12

Then, create a pull request where the base branch is branch-1-12 and the compare/head branch is backport-333-to-branch-1-12.