regulator: core: Remove "ramp_delay not set" debug message

This message shows up occasionally but in bursts (seen up to 30 times
per second on my ODROID N2+).

According to Matthias Kaehlcke's comment in 'regulator: core: silence
warning: "VDD1: ramp_delay not set"', this message should have been
removed after restructuring previous code that assumed that ramp_delay
being zero in that function was an error.

Link: https://lore.kernel.org/lkml/625675256c0d75805f088b4be17a3308dc1b7ea4.1477571498.git.hns@goldelico.com/T/Signed-off-by: Christian Kohlschütter <christian@kohlschutter.com>
Link: https://lore.kernel.org/r/20220820131420.16608-1-christian@kohlschutter.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/core.c

@@ -3497,10 +3497,8 @@ static int _regulator_set_voltage_time(struct regulator_dev *rdev,
 		 (new_uV < old_uV))
 		return rdev->constraints->settling_time_down;
 
-	if (ramp_delay == 0) {
-		rdev_dbg(rdev, "ramp_delay not set\n");
+	if (ramp_delay == 0)
 		return 0;
-	}
 
 	return DIV_ROUND_UP(abs(new_uV - old_uV), ramp_delay);
 }