This is a common issue for those who are using JetPack plugin and there is nothing to worry about this, the smiley face is generated by the WP-Stats. I already faced this issue and yes it was irritating to see that smiley icon on my blog so i Google and found many solutions. I am sharing the best solution which worked for me.
Remove Smiley by editing CSS file.
Add the following code in the theme’s CSS file
If you don’t want to mess with CSS file Just follow the following steps:-
1. Go to Dashboard
2. Select Jetpack
3. In the first configuration option WordPress.com Stats
4. Click Configure
5. On Smiley Check Hide the stats smiley face image.
6. Save Configuration