No longer building 3.x on travis

.travis.yml

@@ -1,47 +0,0 @@
-sudo: false
-
-language: bash
-
-os:
-  - linux
-
-dist: focal
-
-branches:
-  only:
-  - master
-
-
-before_script:
-  - "export DISPLAY=:99.0"
-  - sleep 3 # give xvfb some time to start
-  - wget https://downloads.arduino.cc/arduino-1.8.19-linux64.tar.xz
-  - tar xf arduino-1.8.19-linux64.tar.xz
-  - mv arduino-1.8.19 $HOME/arduino_ide
-  - cd $HOME/arduino_ide/hardware
-  - mkdir esp32
-  - cd esp32
-  - wget https://github.com/espressif/arduino-esp32/archive/refs/tags/2.0.0.tar.gz
-  - tar -xzf 2.0.0.tar.gz 
-  - mv arduino-esp32-2.0.0/ esp32
-  - cd esp32/tools
-  - python --version
-  - python get.py
-  - pip install --user platformio
-  - platformio update
-  
-script:
-  - cd $TRAVIS_BUILD_DIR
-  - export PATH="$HOME/arduino_ide:$PATH"
-  - arduino --board esp32:esp32:esp32:PSRAM=enabled,PartitionScheme=huge_app,FlashFreq=80 --pref compiler.warning_level=all --save-prefs
-  - arduino --verbose --verify esp32-cam-webserver.ino
-  - cp --preserve --verbose myconfig.sample.h myconfig.h
-  - arduino --verbose --verify esp32-cam-webserver.ino
-  - platformio run
-
-  
-notifications:
-  email:
-    on_success: change
-    on_failure: change
-