Remove TC-INFERENCE-004: CUBLAS Fallback Verification

Redundant test - if TC-INFERENCE-002 (Basic Inference) passes,
CUBLAS fallback is already working. Any errors would cause
inference to fail, making a separate error-check test unnecessary.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/testcases/inference/TC-INFERENCE-004.yml

@@ -1,32 +0,0 @@
-id: TC-INFERENCE-004
-name: CUBLAS Fallback Verification
-suite: inference
-priority: 4
-timeout: 120000
-
-dependencies:
-  - TC-INFERENCE-002
-
-steps:
-  - name: Check for CUBLAS errors in logs
-    command: cd docker && docker compose logs 2>&1 | grep -i "CUBLAS_STATUS" | grep -v "SUCCESS" | head -10 || echo "No CUBLAS errors"
-
-  - name: Check compute capability detection
-    command: cd docker && docker compose logs 2>&1 | grep -iE "compute|capability|cc.*3" | head -10 || echo "No compute capability logs"
-
-  - name: Verify no GPU errors
-    command: cd docker && docker compose logs 2>&1 | grep -iE "error|fail" | grep -i gpu | head -10 || echo "No GPU errors"
-
-criteria: |
-  CUBLAS should work correctly on Tesla K80 using legacy fallback.
-
-  Expected:
-  - No CUBLAS_STATUS_ARCH_MISMATCH errors
-  - No CUBLAS_STATUS_NOT_SUPPORTED errors
-  - Compute capability 3.7 may be mentioned in debug logs
-  - No fatal GPU-related errors
-
-  The K80 uses legacy CUBLAS functions (cublasSgemmBatched)
-  instead of modern Ex variants. This should work transparently.
-
-  Accept warnings. Only fail on actual CUBLAS errors.