Update esp32_mcu.cpp

Author: askuric

src/current_sense/hardware_specific/esp32/esp32_mcu.cpp

@@ -68,8 +68,6 @@ int adc_read_index[2]={0};
 
 // function reading an ADC value and returning the read voltage
 float _readADCVoltageLowSide(const int pin, const void* cs_params){
-  uint32_t raw_adc;
-
   mcpwm_unit_t unit = ((ESP32MCPWMCurrentSenseParams*)cs_params)->mcpwm_unit;
   int buffer_index = ((ESP32MCPWMCurrentSenseParams*)cs_params)->buffer_index;
   float adc_voltage_conv = ((ESP32MCPWMCurrentSenseParams*)cs_params)->adc_voltage_conv;