Delete AirQuality_Sensor.ino

libraries/Grove_-_Air_quality_sensor/examples/AirQuality_Sensor/AirQuality_Sensor.ino

-/*
-  AirQuality Demo V1.0.
-  connect to A1 to start testing. it will needs about 20s to start 
-* By: http://www.seeedstudio.com
-*/
-#include"AirQuality.h"
-#include"Arduino.h"
-AirQuality airqualitysensor;
-int current_quality =-1;
-void setup()
-{
-    Serial.begin(9600);
-    airqualitysensor.init(A0);
-}
-void loop()
-{
-    current_quality=airqualitysensor.slope();
-    if (current_quality >= 0)// if a valid data returned.
-    {
-        if (current_quality==0)
-            Serial.println("High pollution! Force signal active");
-        else if (current_quality==1)
-            Serial.println("High pollution!");
-        else if (current_quality==2)
-            Serial.println("Low pollution!");
-        else if (current_quality ==3)
-            Serial.println("Fresh air");
-    }
-}
-ISR(TIMER2_OVF_vect)
-{
-    if(airqualitysensor.counter==122)//set 2 seconds as a detected duty
-    {
-        airqualitysensor.last_vol=airqualitysensor.first_vol;
-        airqualitysensor.first_vol=analogRead(A0);
-        airqualitysensor.counter=0;
-        airqualitysensor.timer_index=1;
-        PORTB=PORTB^0x20;
-    }
-    else
-    {
-        airqualitysensor.counter++;
-    }
-}