minor #20446 [Command] remove exception annotation from run method (Karim Miladi)

This PR was submitted for the master branch but it was merged into the 2.7 branch instead (closes #20446).

Discussion
----------

[Command] remove exception annotation from run method

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

Commits
-------

5a1bf6a [Command] Fixed method comments as phpDoc syntax

src/Symfony/Component/Console/Command/Command.php

@@ -202,8 +202,6 @@ class Command
      *
      * @return int The command exit code
      *
-     * @throws \Exception
-     *
      * @see setCode()
      * @see execute()
      */