remove onGesture and onJoystick event

main.ts

@@ -490,26 +490,6 @@ namespace grove {
         return RangeInInches;
     }
     
-    /**
-     * Create a new driver Grove - 4-Digit Display
-     * @param clkPin value of clk pin number
-     * @param dataPin value of data pin number
-     */
-    //% blockId=grove_tm1637_create block="4-Digit Display at|%clkPin|and|%dataPin"
-    export function createDisplay(clkPin: DigitalPin, dataPin: DigitalPin): TM1637
-    {
-        let display = new TM1637();
-        
-        display.buf = pins.createBuffer(4);
-        display.clkPin = clkPin;
-        display.dataPin = dataPin;
-        display.brightnessLevel = 0;
-        display.pointFlag = false;
-        display.clear();
-        
-        return display;
-    }
- 
     /**
      * init Grove Gesture modules
      * 
@@ -534,8 +514,7 @@ namespace grove {
      * 
      */
     //% blockId=grove_getjoystick block="get joystick key at|%xpin|and|%xpin"
-    export function getJoystick(xpin: AnalogPin, ypin: AnalogPin): number {
+    export function getJoystick(xpin: AnalogPin, ypin: AnalogPin) : number {
         return joystick.read(xpin, ypin);
     }
-
 }