Remove the avisynth patch (fixed upstream by avisynthplus)

The 'Cache::~Cache()' symbol conflict between avisynthplus and
vmaf was fixed upstream by avisynthplus.

References
----------
[1] https://gitlab.archlinux.org/archlinux/packaging/packages/ffmpeg/-/issues/19
[2] https://github.com/AviSynth/AviSynthPlus/commit/d1a32d5229602f181574c95fa0db68bcf1762606
[3] https://github.com/AviSynth/AviSynthPlus/pull/452

070-ffmpeg-fix-cuda-nvcc-with-gcc14.patch

@@ -0,0 +1,11 @@
+--- a/configure
++++ b/configure
+@@ -6748,7 +6748,7 @@ if [ -z "$nvccflags" ]; then
+     nvccflags=$nvccflags_default
+ fi
+ 
+-nvccflags="$nvccflags -std=c++11"
++nvccflags="$nvccflags -std=c++14"
+ 
+ if enabled x86_64 || enabled ppc64 || enabled aarch64; then
+     nvccflags="$nvccflags -m64"