domain form 2008 to 2012

when i transfer domain i transfer all of the 5 role 

C:\Users\administrator.bbb>netdom query fsmo
Schema master               pdc2012.bbb.AC
Domain naming master        pdc2012.bbb.AC
PDC                         pdc2012.bbb.AC
RID pool manager            pdc2012.bbb.AC
Infrastructure master       pdc2012.bbb.AC
The command completed successfully.

but dcdiage show 

  Running enterprise tests on : bbb.AC
    Test omitted by user request: DNS
    Test omitted by user request: DNS
    Starting test: LocatorCheck
       GC Name: \\2008-ADD.bbb.AC
       Locator Flags: 0xe00031fc
       PDC Name: \\pdc2012.bbb.AC
       Locator Flags: 0xe000f1fd
       Time Server Name: \\2008-ADD.bbb.AC
       Locator Flags: 0xe00031fc
       Preferred Time Server Name: \\2008-ADD.bbb.AC
       Locator Flags: 0xe00031fc
       KDC Name: \\2008-ADD.bbb.AC
       Locator Flags: 0xe00031fc
       ......................... bbb.AC passed test LocatorCheck
    Starting test: Intersite
       Skipping site Default-First-Site-Name, this site is outside the scope
       provided by the command line arguments provided.
       ......................... bbb.AC passed test Intersite

why gc and time server on 2008 domain?i cant delelte 2008 when diasble network card 2008 my domain down