fix(core): remove stale tool_supports_subagents and tool_supports_agent_teams config

These config keys were added in efc69ffb but never consumed by any
template, conditional logic, or runtime code. They represent platform
capabilities that the agent can determine at runtime — persisting a
stale user guess adds installation friction with zero execution value.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/core/module.yaml

@@ -23,13 +23,3 @@ output_folder:
   prompt: "Where should output files be saved?"
   default: "_bmad-output"
   result: "{project-root}/{value}"
-
-tool_supports_subagents:
-  prompt: "Subagents are supported by the LLM or Tool I will be using?"
-  default: true
-  result: "{value}"
-
-tool_supports_agent_teams:
-  prompt: "Agent Teams are supported by the LLM or Tool I will be using?"
-  default: false
-  result: "{value}"