AP_HAL_VRBRAIN: remove unused write method

libraries/AP_HAL_VRBRAIN/RCOutput.cpp

@@ -182,13 +182,6 @@ void VRBRAINRCOutput::write(uint8_t ch, uint16_t period_us)
     }
 }
 
-void VRBRAINRCOutput::write(uint8_t ch, uint16_t* period_us, uint8_t len)
-{
-    for (uint8_t i=0; i<len; i++) {
-        write(i, period_us[i]);
-    }
-}
-
 uint16_t VRBRAINRCOutput::read(uint8_t ch)
 {
     if (ch >= VRBRAIN_NUM_OUTPUT_CHANNELS) {

libraries/AP_HAL_VRBRAIN/RCOutput.h

@@ -16,7 +16,6 @@ public:
     void     enable_ch(uint8_t ch);
     void     disable_ch(uint8_t ch);
     void     write(uint8_t ch, uint16_t period_us);
-    void     write(uint8_t ch, uint16_t* period_us, uint8_t len);
     uint16_t read(uint8_t ch);
     void     read(uint16_t* period_us, uint8_t len);
     void     set_safety_pwm(uint32_t chmask, uint16_t period_us);