Apply suggestions from code review

Co-authored-by: Evan Sosenko <razorx@evansosenko.com>

Author: razor-x

README.rst

@@ -289,7 +289,7 @@ The Seam API tells an omitted param apart from one explicitly set to null.
 In an update request, an omitted param leaves the current value unchanged,
 while a null param unsets it.
 
-Python has a single absence value, so this SDK spells the two apart.
+Python has a single nil value `None` which represents an undefined parameter. This SDK provides an explicit null value to send in requests.
 A param set to ``None`` is omitted, and a param set to ``NULL`` is sent as null:
 
 .. code-block:: python

seam/client.py

@@ -152,20 +152,6 @@ def _handle_error_response(self, response: Response):
 
 
 def with_search_params(url: Any, params: Mapping[str, Any]) -> Any:
-    """Returns the url with the params serialized into its query string.
-
-    The Seam API parses URL search params as complex types, so the query
-    string is built here and set on the url as-is. Handing the params to
-    httpx instead would encode them with its own rules.
-
-    :param url: The url of the request
-    :type url: Any
-
-    :param params: The search params of the request
-    :type params: Mapping[str, Any]
-
-    :returns: The url carrying the serialized params"""
-
     query = serialize_url_search_params(params)
 
     if not query: