Remove variable=None from docs

Author: WaVEV

docs/source/ref/models/search.rst

@@ -84,7 +84,7 @@ Optional arguments:
   ``{"maxEdits": 1}``.
 - ``token_order``: Controls token sequence behavior. Accepts values like
   ``"sequential"`` or ``"any"``.
-- ``score``: An optional score expression such as ``{"boost": {"value": 5}}``.
+- ``score``: A :class:`SearchScoreOption` to tune the relevance score.
 
 ``SearchExists``
 ----------------
@@ -476,23 +476,9 @@ operators such as ``and``, ``or``, and ``not``.
     >>> expr2 = SearchText("body", "atlas")
     >>> CombinedSearchExpression(expr1, "and", expr2)
     CombinedSearchExpression(
-        lhs=SearchText(
-            path='headline',
-            query='mongodb',
-            fuzzy=None,
-            match_criteria=None,
-            synonyms=None,
-            score=None
-        ),
+        lhs=SearchText(path='headline', query='mongodb'),
         operator='and',
-        rhs=SearchText(
-            path='body',
-            query='atlas',
-            fuzzy=None,
-            match_criteria=None,
-            synonyms=None,
-            score=None
-        )
+        rhs=SearchText(path='body', query='atlas')
     )
 
 Args: