Remove Travis CI and AppVeyor configs

.travis.yml

@@ -1,57 +0,0 @@
-language: cpp
-dist: xenial
-osx_image: xcode10.1
-
-env:
-  global:
-    - SCONS_CACHE="$HOME/.scons_cache"
-    - SCONS_CACHE_LIMIT=1024
-
-cache:
-  directories:
-    - $SCONS_CACHE
-
-matrix:
-  include:
-    - name: Linux Debug
-      os: linux
-      compiler: gcc
-      env: TARGET=debug PLATFORM=x11
-      addons:
-        apt:
-          sources:
-            - llvm-toolchain-xenial-6.0
-          packages:
-            [scons, pkg-config, build-essential, p7zip-full]
-
-    - name: Linux Release
-      os: linux
-      compiler: gcc
-      addons:
-        apt:
-          packages:
-            [scons, pkg-config, build-essential, p7zip-full]
-      env: TARGET=release PLATFORM=x11
-
-install:
-  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
-      brew update;
-      brew install scons p7zip;
-    fi
-
-  - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
-      curl -LO https://downloads.sourceforge.net/project/scons/scons-local/3.0.5/scons-local-3.0.5.zip;
-      unzip scons-local-3.0.5.zip;
-    fi
-
-script:
-  - if [[ "$TRAVIS_OS_NAME" == "windows" ]]; then
-      export SCONS="./scons.bat";
-      /c/Program\ Files\ \(x86\)/Microsoft\ Visual\ Studio/2017/BuildTools/Common7/Tools/VsDevCmd.bat;
-      ./build_libs.bat $TARGET;
-    else
-      export SCONS="scons";
-      ./build_libs.sh $TARGET;
-    fi
-
-  - $SCONS platform=$PLATFORM target=$TARGET $SCONS_FLAGS;

appveyor.yml

@@ -1,22 +0,0 @@
-environment:
-  matrix:
-    - vs_version: 16
-
-os: Visual Studio 2019
-
-build: off
-
-configuration:
-  - release
-  - debug
-
-platform:
-  - x64
-
-install:
-  - call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
-  - curl -LO https://downloads.sourceforge.net/project/scons/scons-local/3.1.2/scons-local-3.1.2.zip
-  - unzip scons-local-3.1.2.zip
-  - .\build_libs.bat %configuration%
-  - cd ..
-  - .\scons.bat platform=windows target=%configuration% -j2