fix(critical): remove LD_PRELOAD libcccl_allocator.so — crashes service if .so missing

The CCCL preload allocator build frequently fails (CUB headers conflict
with CoreX CUDA 10.2). When the .so doesn't exist, LD_PRELOAD causes
the Python process to abort immediately, resulting in Connection Refused
for all 881 replay requests (0 score).

This was the root cause of sub 655's failure: service never started.

computility-run.yaml

@@ -49,5 +49,4 @@ env:
       value: '1'
     - name: PYTORCH_CUDA_ALLOC_CONF
       value: max_split_size_mb:512
-    - name: LD_PRELOAD
-      value: /workspace/qwen3_6_scripts/cccl_preload/libcccl_allocator.so
+