fix: remove unavailable LLM models from api.md

Author: johnmalek312

mobilerun/api.md

@@ -255,10 +255,7 @@ When creating tasks, these models can be specified:
 - `google/gemini-2.5-flash`
 - `google/gemini-2.5-pro`
 - `google/gemini-3-flash`
-- `google/gemini-3-pro-preview`
 - `anthropic/claude-sonnet-4.5`
-- `minimax/minimax-m2`
-- `moonshotai/kimi-k2-thinking`
 - `qwen/qwen3-8b`
 
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