Delete Travis and Appveyor CI scripts

We now use Github Actions and still have Azure Pipelines as fallback.

.appveyor.yml

@@ -1,72 +0,0 @@
-branches:
-  only:
-    - staging
-    - trying
-    - master
-    - /post-.*/
-
-# Appveyor configuration template for Rust using rustup for Rust installation
-# https://github.com/starkat99/appveyor-rust
-
-## Operating System (VM environment) ##
-
-# Rust needs at least Visual Studio 2013 Appveyor OS for MSVC targets.
-os: Visual Studio 2015
-
-## Build Matrix ##
-environment:
-  matrix:
-
-### MSVC Toolchains ###
-  # Nightly 64-bit MSVC
-    - channel: stable
-      target: x86_64-pc-windows-msvc
-      MSYS_BITS: 64
-  # Nightly 32-bit MSVC
-    - channel: stable
-      target: i686-pc-windows-msvc
-      MSYS_BITS: 32
-
-### GNU Toolchains ###
-  # Nightly 64-bit GNU
-    - channel: stable
-      target: x86_64-pc-windows-gnu
-      MSYS_BITS: 64
-  # Nightly 32-bit GNU
-    - channel: stable
-      target: i686-pc-windows-gnu
-      MSYS_BITS: 32
-
-cache:
-  - '%USERPROFILE%\.cargo\bin'
-  - '%USERPROFILE%\.cargo\.crates.toml'
-
-## Install Script ##
-
-# This is the most important part of the Appveyor configuration. This installs the version of Rust
-# specified by the 'channel' and 'target' environment variables from the build matrix. This uses
-# rustup to install Rust.
-#
-# For simple configurations, instead of using the build matrix, you can simply set the
-# default-toolchain and default-host manually here.
-install:
-  - appveyor-retry appveyor DownloadFile https://win.rustup.rs/ -FileName rustup-init.exe
-  - rustup-init -yv --default-toolchain %channel% --default-host %target%
-  - set PATH=%PATH%;%USERPROFILE%\.cargo\bin
-  - rustc -vV
-  - cargo -vV
-
-## Build Script ##
-
-# 'cargo test' takes care of building for us, so disable Appveyor's build stage. This prevents
-# the "directory does not contain a project or solution file" error.
-build: false
-
-before_test:
-  - set PATH=C:\msys64\mingw%MSYS_BITS%\bin;C:\msys64\usr\bin;%PATH%
-  # Fix undefined references to __acrt_iob_func()
-  - sed -rie "s/#define std([[:alpha:]]+)[[:space:]]+\(__acrt_iob_func\(([[:digit:]]+)\)\)/#define std\1 (\&__iob_func()[\2])/" "C:\msys64\mingw64\x86_64-w64-mingw32\include\stdio.h"
-  - sed -rie "s/#define std([[:alpha:]]+)[[:space:]]+\(__acrt_iob_func\(([[:digit:]]+)\)\)/#define std\1 (\&__iob_func()[\2])/" "C:\msys64\mingw32\i686-w64-mingw32\include\stdio.h"
-
-test_script:
-  - cargo --version

.travis.yml

@@ -1,30 +0,0 @@
-language: rust
-
-rust:
-    - stable
-
-os:
-  - linux
-
-notifications:
-    email:
-        on_success: never
-        on_failure: always
-
-branches:
-  only:
-    # This is where pull requests from "bors r+" are built.
-    - staging
-    # This is where pull requests from "bors try" are built.
-    - trying
-    # Build pull requests.
-    - master
-    # Build post braches
-    - /^post-.*$/
-
-cache:
-  directories:
-    - $HOME/.cargo
-
-script:
-  - cargo rustc -- -Clink-arg=-nostartfiles