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

src/CMakeLists.txt

@@ -189,7 +189,6 @@ else ()
     target_link_libraries(OrcaSlicer ${CMAKE_DL_LIBS} -lstdc++ Threads::Threads pangoft2-1.0)
 endif ()
 
-# Add the Slic3r GUI library, libcurl, OpenGL and GLU libraries.
 if (SLIC3R_GUI)
 #    target_link_libraries(OrcaSlicer ws2_32 uxtheme setupapi libslic3r_gui ${wxWidgets_LIBRARIES})
 target_link_libraries(OrcaSlicer libslic3r_gui wxInspector::wxInspector)

src/dev-utils/platform/unix/build_linux_image.sh.in

@@ -344,7 +344,7 @@ TARGET_BIN="\$1"
 
 if target_missing_runtime_library "\$TARGET_BIN" "libOpenGL.so.0" || ! has_host_runtime_library "libOpenGL.so.0"; then
     echo "Error: missing host OpenGL runtime library libOpenGL.so.0." >&2
-    echo "On Ubuntu/Pop!_OS/Debian, install: libopengl0 and libglu1-mesa" >&2
+    echo "On Ubuntu/Pop!_OS/Debian, install: libopengl0" >&2
     echo "On Arch/CachyOS, install: libglvnd" >&2
     exit 1
 fi

src/libslic3r/CSGMesh/CSGMesh.hpp

@@ -13,7 +13,7 @@ namespace Slic3r { namespace csg {
 // A CSGPartT should be an object that can provide at least a mesh + trafo and an
 // associated csg operation. A collection of CSGPartT objects can then
 // be interpreted as one model and used in various contexts. It can be assembled
-// with CGAL or OpenVDB, rendered with OpenCSG or provided to a ray-tracer to
+// with CGAL or OpenVDB or provided to a ray-tracer to
 // deal with various parts of it according to the supported CSG types...
 //
 // A few simple templated interface functions are provided here and a default