Disable Travis bots, and Appveyor Release bots.

Kokoro bots currently cover all Travis bots:
macos-clang-debug
macos-clang-release
ubuntu-clang-debug
ubuntu-clang-release
ubuntu-gcc-debug
ubuntu-gcc-release
ndk-build
android
check-format

Kokoro bots also cover all Windows Release builds:
windows-VS2013-release
windows-VS2015-release
windows-VS2017-release

Due to a compiler issue on the Kokoro Windows VM, we currently do not
run the Debug build on Kokoro.

Therefore, I am disabling all Travis jobs and the appveyor Release jobs.

.appveyor.yml

@@ -8,14 +8,14 @@ version: "{build}"
 # Put it first so we get its feedback first.
 os:
   - Visual Studio 2017
-  - Visual Studio 2013
+  #- Visual Studio 2013
 
 platform:
   - x64
 
 configuration:
   - Debug
-  - Release
+  #- Release
 
 branches:
   only:
@@ -32,9 +32,9 @@ clone_depth: 1
 
 matrix:
   fast_finish: true # Show final status immediately if a test fails.
-  exclude:
-    - os: Visual Studio 2013
-      configuration: Debug
+  #exclude:
+  #  - os: Visual Studio 2013
+  #    configuration: Debug
 
 # scripts that run after cloning repository
 install:

.travis.yml

@@ -1,121 +0,0 @@
-# Linux Build Configuration for Travis
-
-language: cpp
-
-os:
-  - linux
-  - osx
-
-# Use Ubuntu 14.04 LTS (Trusty) as the Linux testing environment.
-dist: trusty
-sudo: false
-
-env:
-  global:
-    - secure: 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
-  matrix:
-    # Each line is a set of environment variables set before a build.
-    # Thus each line represents a different build configuration.
-    - BUILD_TYPE=RelWithDebInfo
-    - BUILD_TYPE=Debug
-
-compiler:
-  - clang
-  - gcc
-
-matrix:
-  fast_finish: true
-  include:
-    # Additional build using Android NDK with android-cmake
-    - env: BUILD_ANDROID_CMAKE=ON
-    # Additional build using Android NDK with Android.mk
-    - env: BUILD_ANDROID_MK=ON
-    # Additional check over format
-    - env: CHECK_FORMAT=ON
-  exclude:
-    # Skip GCC builds on macOS.
-    - os: osx
-      compiler: gcc
-
-cache:
-  apt: true
-
-git:
-  depth: 1
-
-branches:
-  only:
-    - master
-
-before_install:
-  - if [[ "$BUILD_ANDROID_CMAKE" == "ON" ]] || [[ "$BUILD_ANDROID_MK" == "ON" ]]; then
-      git clone --depth=1 https://github.com/urho3d/android-ndk.git $HOME/android-ndk;
-      export ANDROID_NDK=$HOME/android-ndk;
-      git clone --depth=1 https://github.com/taka-no-me/android-cmake.git $HOME/android-cmake;
-      export TOOLCHAIN_PATH=$HOME/android-cmake/android.toolchain.cmake;
-    fi
-  - if [[ "$CHECK_FORMAT" == "ON" ]]; then
-      curl -L http://llvm.org/svn/llvm-project/cfe/trunk/tools/clang-format/clang-format-diff.py -o utils/clang-format-diff.py;
-    fi
-
-before_script:
-  - git clone --depth=1 https://github.com/KhronosGroup/SPIRV-Headers external/spirv-headers
-  - git clone --depth=1 https://github.com/google/googletest          external/googletest
-  - git clone --depth=1 https://github.com/google/effcee              external/effcee
-  - git clone --depth=1 https://github.com/google/re2                 external/re2
-
-script:
-  # Due to the limitation of Travis platform, we cannot start too many concurrent jobs.
-  # Otherwise GCC will panic with internal error, possibility because of memory issues.
-  # ctest with the current tests doesn't profit from using more than 4 threads.
-  - export NPROC=4
-  - mkdir build && cd build
-  - if [[ "$BUILD_ANDROID_MK" == "ON" ]]; then
-      export BUILD_DIR=$(pwd);
-      mkdir ${BUILD_DIR}/libs;
-      mkdir ${BUILD_DIR}/app;
-      $ANDROID_NDK/ndk-build -C ../android_test NDK_PROJECT_PATH=.
-                             NDK_LIBS_OUT=${BUILD_DIR}/libs
-                             NDK_APP_OUT=${BUILD_DIR}/app -j${NPROC};
-    elif [[ "$BUILD_ANDROID_CMAKE" == "ON" ]]; then
-      cmake -DCMAKE_TOOLCHAIN_FILE=${TOOLCHAIN_PATH}
-            -DANDROID_NATIVE_API_LEVEL=android-9
-            -DCMAKE_BUILD_TYPE=Release
-            -DANDROID_ABI="armeabi-v7a with NEON"
-            -DSPIRV_BUILD_COMPRESSION=ON
-            -DSPIRV_SKIP_TESTS=ON ..;
-      make -j${NPROC};
-    elif [[ "$CHECK_FORMAT" == "ON" ]]; then
-      cd ..;
-      ./utils/check_code_format.sh;
-    else
-      cmake -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DSPIRV_BUILD_COMPRESSION=ON -DCMAKE_INSTALL_PREFIX=install ..;
-      make -j${NPROC} install;
-      ctest -j${NPROC} --output-on-failure --timeout 300;
-    fi
-
-after_success:
-  # Create tarball for deployment
-  - if [[ "${CC}" == "clang" && "${BUILD_ANDROID_MK}" != "ON" && "${BUILD_ANDROID_CMAKE}" != "ON" && "${CHECK_FORMAT}" != "ON" ]]; then
-      cd install;
-      export TARBALL=SPIRV-Tools-master-${TRAVIS_OS_NAME}-${BUILD_TYPE}.zip;
-      find . -print | zip -@ ${TARBALL};
-    fi
-
-before_deploy:
-  # Tag the current master top of the tree as "master-tot".
-  # Travis CI relies on the tag name to push to the correct release.
-  - git config --global user.name "Travis CI"
-  - git config --global user.email "builds@travis-ci.org"
-  - git tag -f master-tot
-  - git push -q -f https://${spirvtoken}@github.com/KhronosGroup/SPIRV-Tools --tags
-
-deploy:
-  provider: releases
-  api_key: ${spirvtoken}
-  on:
-    branch: master
-    condition: ${CC} == clang && ${BUILD_ANDROID_MK} != ON && ${BUILD_ANDROID_CMAKE} != ON && ${CHECK_FORMAT} != ON
-  file: ${TARBALL}
-  skip_cleanup: true
-  overwrite: true