Merge pull request #4843 from cakebaker/dd_remove_unused_imports

dd: fix "unused imports" warning in tests

tests/by-util/test_dd.rs

@@ -1,7 +1,7 @@
 // spell-checker:ignore fname, tname, fpath, specfile, testfile, unspec, ifile, ofile, outfile, fullblock, urand, fileio, atoe, atoibm, availible, behaviour, bmax, bremain, btotal, cflags, creat, ctable, ctty, datastructures, doesnt, etoa, fileout, fname, gnudd, iconvflags, iseek, nocache, noctty, noerror, nofollow, nolinks, nonblock, oconvflags, oseek, outfile, parseargs, rlen, rmax, rposition, rremain, rsofar, rstat, sigusr, sigval, wlen, wstat abcdefghijklm abcdefghi nabcde nabcdefg abcdefg
 
 use crate::common::util::TestScenario;
-#[cfg(not(windows))]
+#[cfg(all(not(windows), feature = "printf"))]
 use crate::common::util::{UCommand, TESTS_BINARY};
 
 use regex::Regex;