Remove type definition causing DI compile issue

[bsdnomad]

Hi,

Second type def is actually not required for 2.3.6+ (suppose that also applies for all 2.3.x versions below)
Symfony\Component\VarDumper\Command\ServerDumpCommand constructor is going to be automatically handled by setup:di:compile and dependency injected properly, otherwise it always throws an exception and the command is not available when executing bin/magento or its commands

...
In ClassReader.php line 26:
                                                                                 
  Class Wiringa\DumpServer\Console\ServerDumpCommand\Interceptor does not exist  

[bsdnomad]

Not working quite properly, should be tested more