journal: Don't discard -b arg when followed by -e

Allowing -e to be used to view the last logs of a previous boot seems
like a useful feature so let's not discard -b options anymore when
followed by -e.

Fixes #22107

src/boot/efi/boot.c

@@ -1978,7 +1978,7 @@ static EFI_STATUS boot_windows_bitlocker(void) {
                         continue;
 
                 CHAR8 buf[block_io->Media->BlockSize];
-                block_io->ReadBlocks(block_io, block_io->Media->MediaId, 0, sizeof(buf), buf);
+                err = block_io->ReadBlocks(block_io, block_io->Media->MediaId, 0, sizeof(buf), buf);
                 if (EFI_ERROR(err))
                         continue;
 

src/journal/journalctl.c

@@ -552,8 +552,6 @@ static int parse_argv(int argc, char *argv[]) {
                                 arg_lines = 1000;
 
                         arg_boot = true;
-                        arg_boot_id = SD_ID128_NULL;
-                        arg_boot_offset = 0;
 
                         break;