Farlands Tweaks Core 1.3 - BFC chunk_culling dead-uniform cleanup 1

Targets Brute Force Culling Revived 2.2 on Minecraft 1.20.1.

BFC's chunk_culling shader JSON declares CullingFrustum[24], but the linked GLSL program
optimizes that uniform away because the frustum/calculateCube path does not contribute to
main(). Minecraft therefore logs that CullingFrustum cannot be found in the shader program.

Farlands Tweaks supplies a resource override for only chunk_culling.json with the obsolete
CullingFrustum JSON declaration removed. The GLSL shaders are not changed. BFC's Java-side
uniform lookup is nullable and already guards the CullingFrustum upload, so this cleanup does
not alter the active depth/chunk-culling path; it only stops requesting an optimized-away
uniform from ShaderInstance.
