delete module's redundant print_status()

- we can already get the running status from ModuleBase and the other misc information is already available through perf or uORB

src/drivers/distance_sensor/pga460/pga460.cpp

@@ -464,12 +464,6 @@ void PGA460::print_diagnostics(const uint8_t diagnostic_byte)
 	}
 }
 
-int PGA460::print_status()
-{
-	PX4_INFO("Distance: %2.2f", (double)_previous_valid_report_distance);
-	return PX4_OK;
-}
-
 int PGA460::print_usage(const char *reason)
 {
 	if (reason) {

src/drivers/distance_sensor/pga460/pga460.h

@@ -267,11 +267,6 @@ public:
 	 */
 	void print_diagnostics(const uint8_t diagnostic_byte);
 
-	/**
-	 * Diagnostics - print some basic information about the driver.
-	 */
-	int print_status() override;
-
 	/**
 	 * @brief Reads the threshold registers.
 	 * @return Returns true if the threshold registers are set to default