Apply zero-sum swap: demote Opus 4.6 from suggested/featured

Opus 4.7 now carries featured_rank=2, editorial_notes, suggested_for_evals,
and suggested_for_data_gen. Removing the same flags from Opus 4.6 keeps the
suggested/featured count stable across the Claude Opus family.

https://claude.ai/code/session_01Xnfzt91McoMdqaiRv1g6xg

Author: claude

libs/core/kiln_ai/adapters/ml_model_list.py

@@ -1970,8 +1970,6 @@ class KilnModel(BaseModel):
         family=ModelFamily.claude,
         name=ModelName.claude_opus_4_6,
         friendly_name="Claude Opus 4.6",
-        featured_rank=2,
-        editorial_notes="Anthropic's best Claude model. Expensive, but often the best.",
         providers=[
             KilnModelProvider(
                 name=ModelProviderName.openrouter,
@@ -1980,8 +1978,6 @@ class KilnModel(BaseModel):
                 openrouter_reasoning_object=True,
                 available_thinking_levels=CLAUDE_OPENROUTER_THINKING_LEVELS,
                 default_thinking_level="none",
-                suggested_for_evals=True,
-                suggested_for_data_gen=True,
                 supports_doc_extraction=True,
                 supports_vision=True,
                 multimodal_capable=True,
@@ -1999,8 +1995,6 @@ class KilnModel(BaseModel):
                 temp_top_p_exclusive=True,
                 available_thinking_levels=CLAUDE_ANTHROPIC_EFFORT_THINKING_LEVELS,
                 default_thinking_level="high",
-                suggested_for_evals=True,
-                suggested_for_data_gen=True,
                 supports_doc_extraction=True,
                 supports_vision=True,
                 multimodal_capable=True,