Remove travis CI

* it is redundant with github action
* less integrated
* fails someone for some unexpected reasons
* it is blocking code coverage results ?!

.travis.yml

@@ -1,72 +0,0 @@
-language: rust
-
-rust:
-    - stable
-    - beta
-
-os:
-    - linux
-    # - osx
-
-env:
-  # sphinx v1.8.0 is bugged & fails for linux builds; so, force specific `sphinx` version
-  global: FEATURES='' TEST_INSTALL='' SPHINX_VERSIONED='sphinx==1.7.8'
-
-matrix:
-  allow_failures:
-    - rust: beta
-    - rust: nightly
-  fast_finish: true
-  include:
-    - rust: 1.40.0
-      env: FEATURES=unix
-    # - rust: stable
-    #   os: linux
-    #   env: FEATURES=unix TEST_INSTALL=true
-    # - rust: stable
-    #   os: osx
-    #   env: FEATURES=macos TEST_INSTALL=true
-    - rust: nightly
-      os: linux
-      env: FEATURES=nightly,unix TEST_INSTALL=true
-    - rust: nightly
-      os: osx
-      env: FEATURES=nightly,macos TEST_INSTALL=true
-    - rust: nightly
-      os: linux
-      env: FEATURES=nightly,feat_os_unix_redox CC=x86_64-unknown-redox-gcc CARGO_ARGS='--no-default-features --target=x86_64-unknown-redox' REDOX=1
-
-cache:
-  directories:
-    - $HOME/.cargo
-
-sudo: true
-
-before_install:
-  - if [ $REDOX ]; then ./.travis/redox-toolchain.sh; fi
-
-install:
-  - if [ $TRAVIS_OS_NAME = linux ]; then sudo apt-get install python-pip && sudo pip install $SPHINX_VERSIONED; fi
-  - |
-    if [ $TRAVIS_OS_NAME = osx ]; then
-      brew update
-      brew upgrade python
-      pip3 install $SPHINX_VERSIONED
-    fi
-
-script:
-  - cargo build $CARGO_ARGS --features "$FEATURES"
-  - if [ ! $REDOX ]; then cargo test $CARGO_ARGS -p uucore -p coreutils --features "$FEATURES" --no-fail-fast; fi
-  - if [ -n "$TEST_INSTALL" ]; then mkdir installdir_test; DESTDIR=installdir_test make install; [ `ls installdir_test/usr/local/bin | wc -l` -gt 0 ]; fi
-
-addons:
-  apt:
-    packages:
-      - libssl-dev
-
-after_success: |
-  if [ "$TRAVIS_OS_NAME" = linux -a "$TRAVIS_RUST_VERSION" = stable ]; then
-    bash <(curl https://raw.githubusercontent.com/xd009642/tarpaulin/master/travis-install.sh)
-    cargo tarpaulin --out Xml
-    bash <(curl -s https://codecov.io/bash)
-  fi

CONTRIBUTING.md

@@ -70,10 +70,6 @@ lines for non-utility modules include:
 README: add help
 ```
 
-```
-travis: fix build
-```
-
 ```
 uucore: add new modules
 ```

README.md

@@ -6,7 +6,6 @@
 [![LOC](https://tokei.rs/b1/github/uutils/coreutils?category=code)](https://github.com/Aaronepower/tokei)
 [![dependency status](https://deps.rs/repo/github/uutils/coreutils/status.svg)](https://deps.rs/repo/github/uutils/coreutils)
 
-[![Build Status](https://api.travis-ci.org/uutils/coreutils.svg?branch=master)](https://travis-ci.org/uutils/coreutils)
 [![Build Status (FreeBSD)](https://api.cirrus-ci.com/github/uutils/coreutils.svg)](https://cirrus-ci.com/github/uutils/coreutils/master)
 [![CodeCov](https://codecov.io/gh/uutils/coreutils/branch/master/graph/badge.svg)](https://codecov.io/gh/uutils/coreutils)