efi_loader: remove duplicate image size check

The image size is checked in efi_load_pe(). Avoid checking it twice.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>

lib/efi_loader/efi_boottime.c

@@ -1883,10 +1883,6 @@ efi_status_t EFIAPI efi_load_image(bool boot_policy,
 		if (ret != EFI_SUCCESS)
 			goto error;
 	} else {
-		if (!source_size) {
-			ret = EFI_LOAD_ERROR;
-			goto error;
-		}
 		dest_buffer = source_buffer;
 	}
 	/* split file_path which contains both the device and file parts */