Remove redundant NUM_FAILED > 0 guard in test retry logic

The -s check already guarantees the file is non-empty, so
NUM_FAILED > 0 is always true in that branch.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: sbryngelson

.github/workflows/test.yml

@@ -151,7 +151,7 @@ jobs:
           # Retry only if a small number of tests failed (sporadic failures)
           if [ -s tests/failed_uuids.txt ]; then
             NUM_FAILED=$(wc -l < tests/failed_uuids.txt)
-            if [ "$NUM_FAILED" -gt 0 ] && [ "$NUM_FAILED" -le 5 ]; then
+            if [ "$NUM_FAILED" -le 5 ]; then
               FAILED=$(cat tests/failed_uuids.txt | tr '\n' ' ')
               echo ""
               echo "=== Retrying $NUM_FAILED failed test(s): $FAILED ==="