Torizon: Remove unnecessary X11 dependencies from Torizon build

Remove libxcb* packages as they are not needed for linuxkms backend.
The demos use backend-linuxkms-noseat which doesn't require X11 libraries.

Author: task-jp

docker/Dockerfile.torizon-demos

@@ -25,9 +25,9 @@ RUN rustup target add $RUST_TOOLCHAIN_ARCH
 ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc
 ENV CARGO_TARGET_ARMV7_UNKNOWN_LINUX_GNUEABIHF_LINKER=arm-linux-gnueabihf-gcc
 
-# Install Slint build dependencies (libxcb, etc.)
+# Install Slint build dependencies for linuxkms backend
 RUN apt-get update && \
-    DEBIAN_FRONTEND=noninteractive apt-get install --assume-yes --allow-change-held-packages pkg-config libfontconfig1-dev:$TOOLCHAIN_ARCH libxcb1-dev:$TOOLCHAIN_ARCH libxcb-render0-dev:$TOOLCHAIN_ARCH libxcb-shape0-dev:$TOOLCHAIN_ARCH libxcb-xfixes0-dev:$TOOLCHAIN_ARCH libxkbcommon-dev:$TOOLCHAIN_ARCH libinput-dev:$TOOLCHAIN_ARCH libudev-dev:$TOOLCHAIN_ARCH libgbm-dev:$TOOLCHAIN_ARCH libdrm2:$TOOLCHAIN_ARCH libdrm2- libdrm-amdgpu1- python3 clang libstdc++-11-dev:$TOOLCHAIN_ARCH ninja-build && \
+    DEBIAN_FRONTEND=noninteractive apt-get install --assume-yes --allow-change-held-packages pkg-config libfontconfig1-dev:$TOOLCHAIN_ARCH libxkbcommon-dev:$TOOLCHAIN_ARCH libinput-dev:$TOOLCHAIN_ARCH libudev-dev:$TOOLCHAIN_ARCH libgbm-dev:$TOOLCHAIN_ARCH libdrm2:$TOOLCHAIN_ARCH libdrm2- libdrm-amdgpu1- python3 clang libstdc++-11-dev:$TOOLCHAIN_ARCH ninja-build && \
     rm -rf /var/lib/apt/lists/*
 
 # Don't require font-config when the compiler runs