Remove sv8000 from hardware-specific defaults

The main configgen-defaults.yml already defines the default emulator.
Hardware-specific files should only override when the default emulator
is not available on that device.

Author: WizzardSK

package/batocera/core/batocera-configgen/configs/configgen-defaults-qcs6490.yml

@@ -58,9 +58,6 @@ bbc:
 adam:
   emulator: mame
   core:     mame
-sv8000:
-  emulator: mame
-  core:     mame
 gmaster:
   emulator: mame
   core:     mame

package/batocera/core/batocera-configgen/configs/configgen-defaults-sm8250.yml

@@ -58,9 +58,6 @@ bbc:
 adam:
   emulator: mame
   core:     mame
-sv8000:
-  emulator: mame
-  core:     mame
 gmaster:
   emulator: mame
   core:     mame

package/batocera/core/batocera-configgen/configs/configgen-defaults-sm8550.yml

@@ -56,9 +56,6 @@ bbc:
 adam:
   emulator: mame
   core:     mame
-sv8000:
-  emulator: mame
-  core:     mame
 gmaster:
   emulator: mame
   core:     mame

package/batocera/core/batocera-configgen/configs/configgen-defaults-x86_64.yml

@@ -76,11 +76,6 @@ arcadia:
   core:     mame
   options:
     sharemameart: 0
-sv8000:
-  emulator: mame
-  core:     mame
-  options:
-    sharemameart: 0
 gmaster:
   emulator: mame
   core:     mame