Remove shell_exec for convert

Fixes #65

This simply removes the `imagemagick` reporting under `system_utils` as the Package information isn't actually needed.

Imagic php_module is already reported earlier in the same array.

`convert` isn't always present on systems since the imagemagick package package doesn't need to be installed along the php_module.

Author: mrxkon

functions.php

@@ -214,9 +214,6 @@ function get_env_details() {
 	$curl = array_shift( $curl_bits );
 	$env['system_utils']['curl'] = trim( $curl );
 	$env['system_utils']['ghostscript'] = trim( shell_exec( 'gs --version' ) );
-	$ret = shell_exec( 'convert --version' );
-	preg_match( '#Version: ImageMagick ([^\s]+)#', $ret, $matches );
-	$env['system_utils']['imagemagick'] = isset( $matches[1] ) ? $matches[1] : false;
 	$env['system_utils']['openssl'] = str_replace( 'OpenSSL ', '', trim( shell_exec( 'openssl version' ) ) );
 	return $env;
 }

prepare.php

@@ -78,9 +78,6 @@
 \$curl = array_shift( \$curl_bits );
 \$env['system_utils']['curl'] = trim( \$curl );
 \$env['system_utils']['ghostscript'] = trim( shell_exec( 'gs --version' ) );
-\$ret = shell_exec( 'convert --version' );
-preg_match( '#Version: ImageMagick ([^\s]+)#', \$ret, \$matches );
-\$env['system_utils']['imagemagick'] = isset( \$matches[1] ) ? \$matches[1] : false;
 \$env['system_utils']['openssl'] = str_replace( 'OpenSSL ', '', trim( shell_exec( 'openssl version' ) ) );
 file_put_contents( __DIR__ . '/tests/phpunit/build/logs/env.json', json_encode( \$env, JSON_PRETTY_PRINT ) );
 if ( 'cli' === php_sapi_name() && defined( 'WP_INSTALLING' ) && WP_INSTALLING ) {