Delete .travis.yml file. (#5987)

All the workflows are now migrated to Github Actions.
Update the on-push.sh script to remove references to TravisCI variables.
Signed-off-by: NAbdelatif Guettouche <abdelatif.guettouche@espressif.com>

.github/scripts/check-cmakelists.sh

 #!/bin/bash
 #
-# This script is for Travis. It checks all non-examples source files in libraries/ and cores/ are listed in
+# This script is used in the CI workflow. It checks all non-examples source files in libraries/ and cores/ are listed in
 # CMakeLists.txt for the cmake-based IDF component
 #
 # If you see an error running this script, edit CMakeLists.txt and add any new source files into your PR

.github/scripts/on-push.sh

@@ -2,18 +2,7 @@
 
 set -e
 
-if [ ! -z "$TRAVIS_TAG" ]; then
-	echo "Skipping Test: Tagged build"
-	exit 0
-fi
-
-if [ ! -z "$GITHUB_WORKSPACE" ]; then
-	export TRAVIS_BUILD_DIR="$GITHUB_WORKSPACE"
-	export TRAVIS_REPO_SLUG="$GITHUB_REPOSITORY"
-elif [ ! -z "$TRAVIS_BUILD_DIR" ]; then
-	export GITHUB_WORKSPACE="$TRAVIS_BUILD_DIR"
-	export GITHUB_REPOSITORY="$TRAVIS_REPO_SLUG"
-else
+if [ -z "$GITHUB_WORKSPACE" ]; then
 	export GITHUB_WORKSPACE="$PWD"
 	export GITHUB_REPOSITORY="espressif/arduino-esp32"
 fi

.travis.yml

-sudo: false
-
-language: python
-
-os:
-  - linux
-
-git:
-  depth: false
-
-before_install:
-  - git submodule update --init --recursive
-
-stages:
-  - build
-  - deploy
-
-jobs:
-  include:
-
-    - name: "Build Arduino 0"
-      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
-      stage: build
-      script: $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh 0 10
-
-    - name: "Build Arduino 1"
-      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
-      stage: build
-      script: $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh 1 10
-
-    - name: "Build Arduino 2"
-      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
-      stage: build
-      script: $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh 2 10
-
-    - name: "Build Arduino 3"
-      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
-      stage: build
-      script: $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh 3 10
-
-    - name: "Build PlatformIO"
-      if: tag IS blank AND (type = pull_request OR (type = push AND branch = master))
-      stage: build
-      script: $TRAVIS_BUILD_DIR/.github/scripts/on-push.sh 1 1
-
-notifications:
-  email:
-    on_success: change
-    on_failure: change
-  webhooks:
-    urls:
-        - https://webhooks.gitter.im/e/cb057279c430d91a47a8
-    on_success: change  # options: [always|never|change] default: always
-    on_failure: always  # options: [always|never|change] default: always
-    on_start: never     # options: [always|never|change] default: always
\ No newline at end of file