Copy changes from the no-history fork, generated back in 2023

Original commit message:
> commit f138311d2d2e0cc9ba0496d523bb46f2c1c9fb73
> Author: rtk0c <[email protected]>
> Date:   Wed Sep 20 23:58:58 2023 -0700
>
>     Copy from the PlasticSCM repo, replace vendored glm wtih conan

In reality, this also introduced a few uncommitted changes in the
original PlasticSCM repo. See the modified and new files in this patch.

1 files changed, 0 insertions, 92 deletions

diff --git a/3rdparty/glm/source/.appveyor.yml b/3rdparty/glm/source/.appveyor.yml
deleted file mode 100644
index 5ce6028..0000000
--- a/3rdparty/glm/source/.appveyor.yml
+++ /dev/null
@@ -1,92 +0,0 @@
-shallow_clone: true
-
-platform:
-  - x86
-  - x64
-
-configuration:
-  - Debug
-  - Release
-
-image:
-  - Visual Studio 2013
-  - Visual Studio 2015
-  - Visual Studio 2017
-  - Visual Studio 2019
-
-environment:
-  matrix:
-    - GLM_ARGUMENTS: -DGLM_TEST_FORCE_PURE=ON
-    - GLM_ARGUMENTS: -DGLM_TEST_ENABLE_SIMD_SSE2=ON -DGLM_TEST_ENABLE_LANG_EXTENSIONS=ON
-    - GLM_ARGUMENTS: -DGLM_TEST_ENABLE_SIMD_AVX=ON -DGLM_TEST_ENABLE_LANG_EXTENSIONS=ON
-    - GLM_ARGUMENTS: -DGLM_TEST_ENABLE_SIMD_AVX=ON -DGLM_TEST_ENABLE_LANG_EXTENSIONS=ON -DGLM_TEST_ENABLE_CXX_14=ON
-    - GLM_ARGUMENTS: -DGLM_TEST_ENABLE_SIMD_AVX=ON -DGLM_TEST_ENABLE_LANG_EXTENSIONS=ON -DGLM_TEST_ENABLE_CXX_17=ON
-
-matrix:
-    exclude:
-    - image: Visual Studio 2013
-      GLM_ARGUMENTS: -DGLM_TEST_ENABLE_SIMD_AVX=ON -DGLM_TEST_ENABLE_LANG_EXTENSIONS=ON
-    - image: Visual Studio 2013
-      GLM_ARGUMENTS: -DGLM_TEST_ENABLE_SIMD_AVX=ON -DGLM_TEST_ENABLE_LANG_EXTENSIONS=ON -DGLM_TEST_ENABLE_CXX_14=ON
-    - image: Visual Studio 2013
-      GLM_ARGUMENTS: -DGLM_TEST_ENABLE_SIMD_AVX=ON -DGLM_TEST_ENABLE_LANG_EXTENSIONS=ON -DGLM_TEST_ENABLE_CXX_17=ON
-    - image: Visual Studio 2013
-      configuration: Debug
-    - image: Visual Studio 2015
-      GLM_ARGUMENTS: -DGLM_TEST_ENABLE_SIMD_SSE2=ON -DGLM_TEST_ENABLE_LANG_EXTENSIONS=ON
-    - image: Visual Studio 2015
-      GLM_ARGUMENTS: -DGLM_TEST_ENABLE_SIMD_AVX=ON -DGLM_TEST_ENABLE_LANG_EXTENSIONS=ON -DGLM_TEST_ENABLE_CXX_14=ON
-    - image: Visual Studio 2015
-      GLM_ARGUMENTS: -DGLM_TEST_ENABLE_SIMD_AVX=ON -DGLM_TEST_ENABLE_LANG_EXTENSIONS=ON -DGLM_TEST_ENABLE_CXX_17=ON
-    - image: Visual Studio 2015
-      platform: x86
-    - image: Visual Studio 2015
-      configuration: Debug
-    - image: Visual Studio 2017
-      platform: x86
-    - image: Visual Studio 2017
-      configuration: Debug
-    - image: Visual Studio 2019
-      platform: x64
-
-branches:
-  only:
-    - master
-
-before_build:
-  - ps: |
-      mkdir build
-      cd build
-
-      if ("$env:APPVEYOR_JOB_NAME" -match "Image: Visual Studio 2013") {
-          $env:generator="Visual Studio 12 2013"
-      } 
-      if ("$env:APPVEYOR_JOB_NAME" -match "Image: Visual Studio 2015") {
-          $env:generator="Visual Studio 14 2015"
-      } 
-      if ("$env:APPVEYOR_JOB_NAME" -match "Image: Visual Studio 2017") {
-          $env:generator="Visual Studio 15 2017"
-      }
-      if ("$env:APPVEYOR_JOB_NAME" -match "Image: Visual Studio 2019") {
-          $env:generator="Visual Studio 16 2019"
-      }
-      if ($env:PLATFORM -eq "x64") {
-          $env:generator="$env:generator Win64"
-      }
-      echo generator="$env:generator"
-      cmake .. -G "$env:generator" -DCMAKE_INSTALL_PREFIX="$env:APPVEYOR_BUILD_FOLDER/install" -DGLM_QUIET=ON -DGLM_TEST_ENABLE=ON "$env:GLM_ARGUMENTS"
-
-build_script:
-  - cmake --build . --parallel --config %CONFIGURATION% -- /m /v:minimal
-  - cmake --build . --target install --parallel --config %CONFIGURATION% -- /m /v:minimal
-
-test_script:
-  - ctest --parallel 4 --verbose -C %CONFIGURATION%
-  - cd ..
-  - ps: |
-      mkdir build_test_cmake
-      cd build_test_cmake
-      cmake ..\test\cmake\ -G "$env:generator" -DCMAKE_PREFIX_PATH="$env:APPVEYOR_BUILD_FOLDER/install"
-  - cmake --build . --parallel --config %CONFIGURATION% -- /m /v:minimal
-
-deploy: off