Fixing some typos

CanvasExample/app/src/main/java/com/example/canvasexample/MyCanvasView.java

@@ -82,11 +82,6 @@ protected void onSizeChanged(int width, int height,
         mExtraCanvas.drawColor(mBackgroundColor);
     }
 
-    @Override
-    protected void onDraw(Canvas canvas) {
-        super.onDraw(canvas);
-        // Draw the bitmap that has the saved path.
-        canvas.drawBitmap(mExtraBitmap, 0, 0, null);
 
 @Override
     protected void onDraw(Canvas canvas) {
@@ -101,7 +96,6 @@ protected void onDraw(Canvas canvas) {
                 getScreenWidth() - inset, getScreenHeight() - inset);
         canvas.drawRect(myFrame, mPaint);
     }
-    }
 
     // Variables for the latest x,y values,
     // which are the starting point for the next path.
@@ -171,9 +165,4 @@ public boolean onTouchEvent(MotionEvent event) {
     public static int getScreenWidth() {
         return Resources.getSystem().getDisplayMetrics().widthPixels;
     }
-
-    // Get the height of the screen
-    public static int getScreenHeight() {
-        return Resources.getSystem().getDisplayMetrics().heightPixels;
-    }
 }