SetContextualLogger: remove unintentionally merged API call

The SetContextualLogger call is from an earlier draft for contextual logging
and was replaced by SetLoggerWithOptions. It shouldn't have been merged in the
first place.

contextual.go

@@ -46,10 +46,6 @@ var (
 	// globalLogger.
 	globalLoggerOptions loggerOptions
 
-	// contextualLogger defines whether globalLogger may get called
-	// directly.
-	contextualLogger bool
-
 	// klogLogger is used as fallback for logging through the normal klog code
 	// when no Logger is set.
 	klogLogger logr.Logger = logr.New(&klogger{})
@@ -137,15 +133,6 @@ type loggerOptions struct {
 	flush            func()
 }
 
-// SetContextualLogger does the same as SetLogger, but in addition the
-// logger may also get called directly by code that retrieves it
-// with FromContext, TODO or Background. The logger therefore must
-// implements its own verbosity checking.
-func SetContextualLogger(logger logr.Logger) {
-	globalLogger = &logger
-	contextualLogger = true
-}
-
 // ClearLogger removes a backing Logger implementation if one was set earlier
 // with SetLogger.
 //