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, 65 deletions

diff --git a/3rdparty/glm/source/test/gtx/gtx_easing.cpp b/3rdparty/glm/source/test/gtx/gtx_easing.cpp
deleted file mode 100644
index 0e98cd5..0000000
--- a/3rdparty/glm/source/test/gtx/gtx_easing.cpp
+++ /dev/null
@@ -1,65 +0,0 @@
-#define GLM_ENABLE_EXPERIMENTAL
-#include <glm/glm.hpp>
-#include <glm/gtx/quaternion.hpp>
-#include <glm/gtx/easing.hpp>
-
-namespace
-{
-
-	template<typename T>
-	void _test_easing()
-	{
-		T a = static_cast<T>(0.5);
-		T r;
-
-		r = glm::linearInterpolation(a);
-
-		r = glm::quadraticEaseIn(a);
-		r = glm::quadraticEaseOut(a);
-		r = glm::quadraticEaseInOut(a);
-
-		r = glm::cubicEaseIn(a);
-		r = glm::cubicEaseOut(a);
-		r = glm::cubicEaseInOut(a);
-
-		r = glm::quarticEaseIn(a);
-		r = glm::quarticEaseOut(a);
-		r = glm::quinticEaseInOut(a);
-
-		r = glm::sineEaseIn(a);
-		r = glm::sineEaseOut(a);
-		r = glm::sineEaseInOut(a);
-
-		r = glm::circularEaseIn(a);
-		r = glm::circularEaseOut(a);
-		r = glm::circularEaseInOut(a);
-
-		r = glm::exponentialEaseIn(a);
-		r = glm::exponentialEaseOut(a);
-		r = glm::exponentialEaseInOut(a);
-
-		r = glm::elasticEaseIn(a);
-		r = glm::elasticEaseOut(a);
-		r = glm::elasticEaseInOut(a);
-
-		r = glm::backEaseIn(a);
-		r = glm::backEaseOut(a);
-		r = glm::backEaseInOut(a);
-
-		r = glm::bounceEaseIn(a);
-		r = glm::bounceEaseOut(a);
-		r = glm::bounceEaseInOut(a);
-	}
-
-}
-
-int main()
-{
-	int Error = 0;
-
-	_test_easing<float>();
-	_test_easing<double>();
-
-	return Error;
-}
-