style(guardrails): drop three whitespace-only leftovers from the narrowing

Three hunks in the diff carried no functional content, each in a
function this PR otherwise does not touch: a blank line deleted in
__init__, one added at the end of an unrelated docstring, and one
deleted in _mask_content_list -- the last residue of the masking
change that was split out to #39254 and reverted after E2E showed it
had no effect.

ruff format is satisfied either way, so none of them were required.
Removing them takes the source diff from 28 hunks to 25 and leaves
_mask_content_list, __init__ and the retry helper untouched.

litellm/proxy/guardrails/guardrail_hooks/bedrock_guardrails.py

@@ -287,6 +287,7 @@ class BedrockGuardrail(CustomGuardrail, BaseAWSLLM):
         self.guardrail_provider = "bedrock"
         self.chunk_budget_chars = chunk_budget_chars
         self.experimental_use_latest_role_message_only = bool(kwargs.get("experimental_use_latest_role_message_only"))
+
         # Resource-less, detect-only InvokeGuardrailChecks mode. Present `checks`
         # routes the guardrail to InvokeGuardrailChecks; absent => ApplyGuardrail.
         self.checks: dict[str, object] | None = self._normalize_checks(checks)
@@ -1251,7 +1252,6 @@ class BedrockGuardrail(CustomGuardrail, BaseAWSLLM):
         guardrail block on any (sub-)chunk raises immediately
         -- callers must not lose that signal by continuing to post the remaining
         chunks.
-
         """
         try:
             response: Final = await self._post_apply_guardrail_content_with_retry(
@@ -3211,6 +3211,7 @@ class BedrockGuardrail(CustomGuardrail, BaseAWSLLM):
                     masking_index += 1
                 if item is not None:
                     new_content.append(item)
+
         return new_content, masking_index
 
     def _apply_masking_to_response(