Remove Travis CI remnants

.travis.yml

@@ -1,41 +0,0 @@
-#os:
-#    - windows
-#    - linux
-
-language: cpp
-
-matrix:
-    include:
-        - os: linux
-          env: 
-          - OS="$TRAVIS_OS_NAME"
-          - LUACC=./luac.cross
-        - os: windows
-          env: 
-          - MSBUILD_PATH="c:\Program Files (x86)\Microsoft Visual Studio\2017\BuildTools\MSBuild\15.0\Bin"
-          - OS="$TRAVIS_OS_NAME"
-          - LUACC=msvc/luac-cross/x64/Debug/luac.cross.exe
-addons:
-  apt:
-    packages:
-    - python-serial
-    - srecord
-    - luarocks
-cache:
-  - directories:
-    - cache
-script:
-- echo OS is $OS $TRAVIS_OS_NAME
-# http://docs.travis-ci.com/user/environment-variables/#Convenience-Variables
-- if [ "$OS" = "linux" ]; then bash "$TRAVIS_BUILD_DIR"/tools/travis/ci-build-linux.sh; fi
-- if [ "$OS" = "windows" ]; then bash "$TRAVIS_BUILD_DIR"/tools/travis/ci-build-windows-ms.sh; fi
-- if [ "$OS" = "linux" -a "$TRAVIS_PULL_REQUEST" != "false" ]; then bash "$TRAVIS_BUILD_DIR"/tools/travis/pr-build.sh; fi
-- cd "$TRAVIS_BUILD_DIR"
-- echo "checking:"
-- find lua_modules lua_examples tests/NTest* -iname "*.lua" -print0 | xargs -0 echo
-- find lua_modules lua_examples tests/NTest* -iname "*.lua" -print0 | xargs -0 $LUACC -p
-- cd tests/NTest
-- if [ "$OS" = "linux" ]; then ../../$LUACC -e ../NTest/NTest_NTest.lua; fi
-- cd "$TRAVIS_BUILD_DIR"
-- if [ "$OS" = "linux" ]; then bash "$TRAVIS_BUILD_DIR"/tools/travis/run-luacheck-linux.sh; fi
-- if [ "$OS" = "windows" ]; then bash "$TRAVIS_BUILD_DIR"/tools/travis/run-luacheck-windows.sh; fi

README.md

@@ -1,7 +1,7 @@
 # NodeMCU 3.0.0
 
 [![Join the chat at https://gitter.im/nodemcu/nodemcu-firmware](https://img.shields.io/gitter/room/badges/shields.svg)](https://gitter.im/nodemcu/nodemcu-firmware?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-[![Build Status](https://travis-ci.org/nodemcu/nodemcu-firmware.svg)](https://travis-ci.org/nodemcu/nodemcu-firmware)
+[![CI](https://github.com/nodemcu/nodemcu-firmware/actions/workflows/build.yml/badge.svg)](https://github.com/nodemcu/nodemcu-firmware/actions/workflows/build.yml)
 [![Documentation Status](https://img.shields.io/badge/docs-release-yellow.svg?style=flat)](http://nodemcu.readthedocs.io/en/release/)
 [![License](https://img.shields.io/badge/license-MIT-blue.svg?style=flat)](https://github.com/nodemcu/nodemcu-firmware/blob/release/LICENSE)