unset autoload-dev.classmap via cli command

[staabm]

My composer.json:

{
	"autoload-dev": {
		"psr-4": {
			"PHPStan\\": [
				"build/PHPStan"
			]
		},
		"classmap": [
			"tests/e2e",
			"tests/PHPStan"
		]
	}
}

Output of composer diagnose:

$ composer diagnose
Checking composer.json: OK
Checking platform settings: OK
Checking git settings: OK git version 2.43.0
Checking http connectivity to packagist: OK
Checking https connectivity to packagist: OK
Checking github.com oauth access: OK does not expire
Checking disk free space: OK
Checking pubkeys:
Tags Public Key Fingerprint: 57815BA2 7E54DC31 7ECC7CC5 573090D0  87719BA6 8F3BB723 4E5D42D0 84A14642
Dev Public Key Fingerprint: 4AC45767 E5EC2265 2F0C1167 CBBB8A2B  0C708369 153E328C AD90147D AFE50952
OK
Checking Composer version: You are not running the latest stable version, run `composer self-update` to update (2.7.0 => 2.7.1)
Checking Composer and its dependencies for vulnerabilities: WARNING
Could not find Composer's installed.json, this must be a non-standard Composer installation.
Composer version: 2.7.0
PHP version: 8.2.12
PHP binary path: C:\tools\php82\php.exe
OpenSSL version: OpenSSL 3.0.11 19 Sep 2023
cURL version: 8.4.0 libz 1.2.12 ssl OpenSSL/3.0.11
zip: extension present, unzip present, 7-Zip present (7z)

When I run this command:

composer config autoload-dev.classmap --unset

I get :

• no change in composer.json

And I expected this to happen:

• the autoload-dev.classmap part should be deleted from the composer.json

running just composer config autoload-dev --unset works as expected and drops the whole section.
composer config scripts.post-install-cmd --unset also works.