Revert "feat: Add argument spec validation to template role"

[richm]

Reverts #217

I merged this accidentally

Summary by CodeRabbit

• Documentation

  • Updated role variable documentation to cover only the supported template_foo and template_bar options, including required/optional status and defaults.
  • Removed examples and references to obsolete template variables.

• Configuration

  • Removed defaults and formal option validation for previously documented template variables, including configuration paths, state, packages, raw values, and services.

[coderabbitai]

Caution

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📥 Commits

Reviewing files that changed from the base of the PR and between 43018d7 and 2606491.

📒 Files selected for processing (3)

• README.md
• defaults/main.yml
• meta/argument_specs.yml

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📝 Walkthrough

Walkthrough

Changes

Template variable cleanup

Layer / File(s)	Summary
Document supported template variables README.md	The README documents template_foo as required and template_bar as optional with a default of true. It removes examples for the other template variables.

Possibly related PRs

• linux-system-roles/template#217: This PR removes the template variables, defaults, and argument specification added by PR #217.

Suggested reviewers: spetrosi

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