Remove misleading line in pin documentation (#13611)

The documentation did not reflect #12921.

docs/reference/cli.md

@@ -2866,7 +2866,6 @@ uv python pin [OPTIONS] [REQUEST]
 </dd><dt id="uv-python-pin--global"><a href="#uv-python-pin--global"><code>--global</code></a></dt><dd><p>Update the global Python version pin.</p>
 <p>Writes the pinned Python version to a <code>.python-version</code> file in the uv user configuration directory: <code>XDG_CONFIG_HOME/uv</code> on Linux/macOS and <code>%APPDATA%/uv</code> on Windows.</p>
 <p>When a local Python version pin is not found in the working directory or an ancestor directory, this version will be used instead.</p>
-<p>Unlike local version pins, this version is used as the default for commands that mutate global state, like <code>uv tool install</code>.</p>
 </dd><dt id="uv-python-pin--help"><a href="#uv-python-pin--help"><code>--help</code></a>, <code>-h</code></dt><dd><p>Display the concise help for this command</p>
 </dd><dt id="uv-python-pin--managed-python"><a href="#uv-python-pin--managed-python"><code>--managed-python</code></a></dt><dd><p>Require use of uv-managed Python versions.</p>
 <p>By default, uv prefers using Python versions it manages. However, it will use system Python versions if a uv-managed Python is not installed. This option disables use of system Python versions.</p>