Remove unused OpenCSG, GLEW and GLU dependencies (#16318)

scripts/flatpak/com.orcaslicer.OrcaSlicer.yml

@@ -55,21 +55,6 @@ modules:
         url: https://gstreamer.freedesktop.org/src/gst-plugins-good/gst-plugins-good-1.22.8.tar.xz
         sha256: e305b9f07f52743ca481da0a4e0c76c35efd60adaf1b0694eb3bb021e2137e39
 
-  - name: glu
-    build-options:
-      cxxflags: -Wno-register
-    config-opts:
-      - --disable-static
-    sources:
-      - type: archive
-        url: https://ftp.osuosl.org/pub/blfs/conglomeration/glu/glu-9.0.2.tar.xz
-        sha256: 6e7280ff585c6a1d9dfcdf2fca489251634b3377bfc33c29e4002466a38d02d4
-    cleanup:
-      - /include
-      - /lib/*.a
-      - /lib/*.la
-      - /lib/pkgconfig
-
   - name: kde-extra-cmake-modules
     buildsystem: cmake-ninja
     sources:
@@ -217,12 +202,6 @@ modules:
         sha256: a133ddc3d3c66143eba9035621db8e0bcf34dba1ee9514a9e23e96afd39fd57a
         dest: external-packages/GLFW
 
-      # OpenCSG 1.4.2
-      - type: file
-        url: https://github.com/floriankirsch/OpenCSG/archive/refs/tags/opencsg-1-4-2-release.zip
-        sha256: 51afe0db79af8386e2027d56d685177135581e0ee82ade9d7f2caff8deab5ec5
-        dest: external-packages/OpenCSG
-
       # SolveSpace libslvs (2D sketch constraint solver, Design tab)
       - type: file
         url: https://github.com/JacobStoren/SolveSpaceLib/archive/4d8704523e4bf212fadf5189f92484244f670fea.zip