Update analyze_cache.py: agree with the type checker and remove code that can never be gotten

Author: wyattscarpenter

misc/analyze_cache.py

@@ -41,8 +41,6 @@ def extract(chunks: Iterable[JsonDict]) -> Iterable[JsonDict]:
             if isinstance(chunk, dict):
                 yield chunk
                 yield from extract(chunk.values())
-            elif isinstance(chunk, list):
-                yield from extract(chunk)
 
     yield from extract([chunk.data for chunk in chunks])
 
@@ -92,8 +90,6 @@ def compress(chunk: JsonDict) -> JsonDict:
 
     def helper(chunk: JsonDict) -> JsonDict:
         nonlocal counter
-        if not isinstance(chunk, dict):
-            return chunk
 
         if len(chunk) <= 2:
             return chunk
@@ -123,8 +119,6 @@ def decompress(chunk: JsonDict) -> JsonDict:
     cache: dict[int, JsonDict] = {}
 
     def helper(chunk: JsonDict) -> JsonDict:
-        if not isinstance(chunk, dict):
-            return chunk
         if ".id" in chunk:
             return cache[chunk[".id"]]