libutil: remove warnOnce macro

it's only used once, and even that one use is highly questionable. more
instances of warnOnce should be much more principled than this has been

Change-Id: I5856570c99cb44462e700d753d0c706a5db03c4b

1 files changed, 0 insertions, 6 deletions

diff --git a/src/libutil/logging.hh b/src/libutil/logging.hh
index 7990ffce0..96f9f0782 100644
--- a/src/libutil/logging.hh
+++ b/src/libutil/logging.hh
@@ -283,12 +283,6 @@ inline void warn(const std::string & fs, const Args & ... args)
     logger->warn(HintFmt(fs, args...).str());
 }
 
-#define warnOnce(haveWarned, args...) \
-    if (!haveWarned) {                \
-        haveWarned = true;            \
-        warn(args);                   \
-    }
-
 void writeToStderr(std::string_view s);
 
 }