utmpx.rs: Remove duplicated const

[oech3]

Conflicting with pub use libc::ACCOUNTING;

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/tail/retry. tests/tail/retry is passing on 'main'. Maybe you have to rebase?
Skip an intermittent issue tests/pr/bounded-memory (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/date/date-locale-hour (passes in this run but fails in the 'main' branch)
Note: The gnu test tests/misc/write-errors was skipped on 'main' but is now failing.

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/misc/io-errors. tests/misc/io-errors is passing on 'main'. Maybe you have to rebase?
GNU test failed: tests/tail/tail-n0f. tests/tail/tail-n0f is passing on 'main'. Maybe you have to rebase?
Skip an intermittent issue tests/date/date-locale-hour (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/date/resolution (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/pr/bounded-memory (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/tty/tty-eof (fails in this run but passes in the 'main' branch)
Congrats! The gnu test tests/cut/cut-huge-range is now passing!

[cakebaker]

Thanks!

[oech3]

tried NetBSD cargo check with this:

   Compiling phf_generator v0.13.1
error[E0308]: mismatched types
   --> src/uucore/src/lib/features/uptime.rs:159:44
    |
159 |             .filter(|r| r.record_type() == BOOT_TIME)
    |                         ---------------    ^^^^^^^^^ expected `i16`, found `u16`
    |                         |
    |                         expected because this is `i16`
    |
help: you can convert a `u16` to an `i16` and panic if the converted value doesn't fit
    |
159 |             .filter(|r| r.record_type() == BOOT_TIME.try_into().unwrap())
    |                                                     ++++++++++++++++++++
error[E0308]: mismatched types
   --> src/uucore/src/lib/features/uptime.rs:306:32
    |
306 |         if ut.record_type() == USER_PROCESS {
    |            ----------------    ^^^^^^^^^^^^ expected `i16`, found `u16`
    |            |
    |            expected because this is `i16`
    |
help: you can convert a `u16` to an `i16` and panic if the converted value doesn't fit
    |
306 |         if ut.record_type() == USER_PROCESS.try_into().unwrap() {
    |                                            ++++++++++++++++++++
error[E0308]: mismatched types
   --> src/uucore/src/lib/features/utmpx.rs:213:9
    |
212 |     pub fn record_type(&self) -> i16 {
    |                                  --- expected `i16` because of return type
213 |         self.inner.ut_type
    |         ^^^^^^^^^^^^^^^^^^ expected `i16`, found `u16`
    |
help: you can convert a `u16` to an `i16` and panic if the converted value doesn't fit
    |
213 |         self.inner.ut_type.try_into().unwrap()
    |                           ++++++++++++++++++++
    Checking indicatif v0.18.4
    Checking crossbeam-deque v0.8.6
error[E0609]: no field `ut_user` on type `libc::utmpx`
   --> src/uucore/src/lib/features/utmpx.rs:225:34
    |
225 |         chars2string!(self.inner.ut_user)
    |                                  ^^^^^^^ unknown field
    |
    = note: available fields are: `ut_name`, `ut_id`, `ut_line`, `ut_host`, `ut_session` ... and 5 others
error[E0308]: mismatched types
   --> src/uucore/src/lib/features/utmpx.rs:267:58
    |
267 |         !self.user().is_empty() && self.record_type() == USER_PROCESS
    |                                    ------------------    ^^^^^^^^^^^^ expected `i16`, found `u16`
    |                                    |
    |                                    expected because this is `i16`
    |
help: you can convert a `u16` to an `i16` and panic if the converted value doesn't fit
    |
267 |         !self.user().is_empty() && self.record_type() == USER_PROCESS.try_into().unwrap()