No need for a special logging level flag; if you are interested in this...

No need for a special logging level flag; if you are interested in this logger, just set its level to FINE.

core/src/main/java/hudson/model/RunMap.java

@@ -194,7 +194,7 @@ public final class RunMap<R extends Run<?,R>> extends AbstractLazyLoadRunMap<R>
                 // or August 0th. Date object doesn't roundtrip those, so we eventually fail to load this data.
                 // Don't even bother trying.
                 if (!isCorrectDate(name)) {
-                    LOGGER.fine("Skipping "+new File(dir,name));
+                    LOGGER.log(FINE, "Skipping {0}", new File(dir,name));
                     return false;
                 }
                 return !name.startsWith("0000") && new File(dir,name).isDirectory();
@@ -219,8 +219,8 @@ public final class RunMap<R extends Run<?,R>> extends AbstractLazyLoadRunMap<R>
             try {
                 R b = cons.create(d);
                 b.onLoad();
-                if (LOGGER.isLoggable(FINE) || LOG_RETRIEVAL)
-                    LOGGER.log(LOG_RETRIEVAL?INFO:FINE,"Loaded " + b.getFullDisplayName(),new ThisIsHowItsLoaded());
+                if (LOGGER.isLoggable(FINE))
+                    LOGGER.log(FINE,"Loaded " + b.getFullDisplayName(),new ThisIsHowItsLoaded());
                 return b;
             } catch (IOException e) {
                 LOGGER.log(Level.WARNING, "could not load " + d, e);
@@ -251,7 +251,5 @@ public final class RunMap<R extends Run<?,R>> extends AbstractLazyLoadRunMap<R>
 
     private static final Logger LOGGER = Logger.getLogger(RunMap.class.getName());
 
-    public static boolean LOG_RETRIEVAL = false;
-
     private static class ThisIsHowItsLoaded extends Exception {}
 }