Refactor radar system

requirements.txt

@@ -1,8 +1,6 @@
 numpy>=1.26,<3
 libusb1>=3.1
 pyserial>=3.5,<4
-pyvisa>=1.14
-PyVISA-py>=0.7  # pure-Python VISA backend ("@py"), required by the SN9000 (and any visa_library="@py") path
 # PyQt6 6.8+ ships only manylinux_2_39 aarch64 wheels (glibc >= 2.39); Jetson /
 # Ubuntu 22.04 has glibc 2.35, so pip would fall back to a source build that
 # dies on qmake. 6.7.1 is the last release with a manylinux_2_28 aarch64 wheel.
@@ -12,8 +10,3 @@ pyqtgraph>=0.13.7
 rpi-hardware-pwm>=0.2.2,<1
 fastapi>=0.110           # embedded web UI (browser view + controls), served in-process
 uvicorn[standard]>=0.29  # ASGI server for the web UI, run on a background thread
-# nvrtc.h, cuda.h and libnvrtc for the sar3d processor's GPU code (kernels are
-# compiled at run time, no nvcc). x86_64 only: on Jetson (aarch64) CUDA comes
-# with JetPack at /usr/local/cuda, where the Makefile finds it.
-nvidia-cuda-nvrtc==13.3.33; platform_machine == "x86_64"   # nvrtc.h + libnvrtc
-nvidia-cuda-runtime==13.3.29; platform_machine == "x86_64" # cuda.h (Driver API)