Apply suggestion from @JohannesGaessler

Co-authored-by: Johannes Gäßler <[email protected]>

Author: yeahdongcn

scripts/compare-llama-bench.py

@@ -235,8 +235,10 @@ def __init__(self, tool: str = "llama-bench"):
         # Set schema-specific properties based on tool
         if self.tool == "llama-bench":
             self.check_keys = set(LLAMA_BENCH_KEY_PROPERTIES + ["build_commit", "test_time", "avg_ts"])
-        else:  # test-backend-ops
+        elif self.tool == "test-backend-ops":
             self.check_keys = set(TEST_BACKEND_OPS_KEY_PROPERTIES + ["build_commit", "test_time"])
+        else:
+            assert False
 
     def _builds_init(self):
         self.build_len = self.build_len_min