nb/amd/pi/00630F01: Remove unused directory and code

No board uses AMD PI 00630F01, so drop it. And drop a single reference
to the now-removed `NORTHBRIDGE_AMD_PI_00630F01` Kconfig option inside
the `drivers/amd/agesa/acpi_tables.c` file.

Change-Id: Ibc45a4a6041220ed22273c1d41f9b796e1acb901
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54897
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/amd/agesa/acpi_tables.c

@@ -9,7 +9,6 @@
  * without new builds of the binaryPI blobs.
  */
 #if !CONFIG(CPU_AMD_AGESA_BINARY_PI) || \
-	CONFIG(NORTHBRIDGE_AMD_PI_00630F01) || \
 	CONFIG(NORTHBRIDGE_AMD_PI_00730F01)
 
 #define HAS_ACPI_SRAT	TRUE