fix: Remove not useful SequenceIterator (#2700)

See also: #2612

Signed-off-by: yangxuan <xuan.yang@zilliz.com>

Author: XuanYang-cn

pymilvus/client/abstract.py

@@ -1,5 +1,5 @@
 import abc
-from typing import Any, Dict, List, Optional, Sequence, Tuple, Union
+from typing import Any, Dict, List, Optional, Tuple, Union
 
 import ujson
 
@@ -351,19 +351,6 @@ def _pack(self, raw: Any):
         )
 
 
-class SequenceIterator:
-    def __init__(self, seq: Sequence[Any]):
-        self._seq = seq
-        self._idx = 0
-
-    def __next__(self) -> Any:
-        if self._idx < len(self._seq):
-            res = self._seq[self._idx]
-            self._idx += 1
-            return res
-        raise StopIteration
-
-
 class BaseRanker:
     def __int__(self):
         return
@@ -653,9 +640,6 @@ def get_fields_by_range(
                 continue
         return field2data
 
-    def __iter__(self) -> SequenceIterator:
-        return SequenceIterator(self)
-
     def __str__(self) -> str:
         """Only print at most 10 query results"""
         reminder = f" ... and {len(self) - 10} results remaining" if len(self) > 10 else ""
@@ -735,9 +719,6 @@ def __init__(
 
         super().__init__(hits)
 
-    def __iter__(self) -> SequenceIterator:
-        return SequenceIterator(self)
-
     def __str__(self) -> str:
         """Only print at most 10 query results"""
         reminder = f" ... and {len(self) - 10} entities remaining" if len(self) > 10 else ""