chore(models): drop x-ai/grok-4.3 from OpenRouter/Nous curated lists in favor of grok-4.5 (#61097)

grok-4.5 is GA and is now the single curated Grok entry on the
aggregator lists. grok-4.3 is NOT retired upstream — it remains fully
usable by typing the model name (validated against the live catalogs);
this only removes it from the short curated picker snapshots. The
xAI-direct list is models.dev-cache-driven and unaffected.

hermes_cli/models.py

@@ -49,7 +49,6 @@ OPENROUTER_MODELS: list[tuple[str, str]] = [
     ("google/gemini-3.5-flash",                ""),
     # xAI
     ("x-ai/grok-4.5",                          ""),
-    ("x-ai/grok-4.3",                          ""),
     # DeepSeek
     ("deepseek/deepseek-v4-pro",               ""),
     ("deepseek/deepseek-v4-flash",             ""),
@@ -195,7 +194,6 @@ _PROVIDER_MODELS: dict[str, list[str]] = {
         "google/gemini-3.5-flash",
         # xAI
         "x-ai/grok-4.5",
-        "x-ai/grok-4.3",
         # DeepSeek
         "deepseek/deepseek-v4-pro",
         "deepseek/deepseek-v4-flash",