OvmfPkg/RiscVVirt/Sec: clean up ProcessLibraryConstructorList() decl

<Library/PeimEntryPoint.h> declares a bogus
ProcessLibraryConstructorList() for the OvmfPkg/RiscVVirt SEC module. Rely
on AutoGen for (properly) declaring ProcessLibraryConstructorList().
Remove the correct, but superfluous, declaration as well.

Build-tested with:

  build -a RISCV64 -b DEBUG -m OvmfPkg/RiscVVirt/Sec/SecMain.inf \
    -p OvmfPkg/RiscVVirt/RiscVVirtQemu.dsc -t GCC5

Cc: Andrei Warkentin <andrei.warkentin@intel.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Sunil V L <sunilvl@ventanamicro.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=990
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20240305113843.68812-5-lersek@redhat.com>
Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>

OvmfPkg/RiscVVirt/Sec/SecMain.inf

@@ -8,7 +8,7 @@
 ##
 
 [Defines]
-  INF_VERSION                    = 0x0001001B
+  INF_VERSION                    = 1.30
   BASE_NAME                      = SecMainRiscV64
   FILE_GUID                      = 16740C0A-AA84-4F62-A06D-AE328057AE07
   MODULE_TYPE                    = SEC