Revert "nixos/frigate: provide ffmpeg-full for nvidia hw accel"

With https://github.com/NixOS/nixpkgs/pull/354952, the regular ffmpeg-headless
should now have all the deps required for frigate to make use of hardware
acceleration on all hardware.

This is progress towards https://github.com/NixOS/nixpkgs/issues/271863

This reverts commit 7e33e470df.

This may be surprising as it's quite soon after
7e33e470df was merged but we decided in
https://github.com/NixOS/nixpkgs/pull/357717#discussion_r1853840512 to merge it
quickly to unbreak master and backport to 24.11. Non-full ffmpeg can be pursued
in master using a simple revert which is where we are now.

nixos/modules/services/video/frigate.nix

@@ -13,7 +13,6 @@ let
     filterAttrsRecursive
     hasPrefix
     makeLibraryPath
-    match
     mkDefault
     mkEnableOption
     mkPackageOption
@@ -108,10 +107,6 @@ let
   withCoralUSB = any (d: d.type == "edgetpu" && hasPrefix "usb" d.device or "") detectors;
   withCoralPCI =  any (d: d.type == "edgetpu" && hasPrefix "pci" d.device or "") detectors;
   withCoral = withCoralPCI || withCoralUSB;
-
-  # Provide ffmpeg-full for NVIDIA hardware acceleration
-  ffmpegArgs = cfg.settings.ffmpeg.hwaccel_args or "";
-  ffmpeg' = if match "/nvidia/" ffmpegArgs != null then pkgs.ffmpeg-full else pkgs.ffmpeg-headless;
 in
 
 {
@@ -571,7 +566,7 @@ in
       path = with pkgs; [
         # unfree:
         # config.boot.kernelPackages.nvidiaPackages.latest.bin
-        ffmpeg'
+        ffmpeg-headless
         libva-utils
         procps
         radeontop