Option 1: You may try turning off "Show Notifications" check box by visiting
Setting-> Apps -> All Apps.
From here, you can select the app sending this notification and un-check the "Show Notifications" check box.
In case if you are not sure which app sending these notifications, you can LONG PRESS the notification area itself, and system will show you "App Info" bubble. Click on it to navigate to Settings of that app.
Once you are in settings, you may turn off Notifications by un-checking the "Show Notifications" check box.
Below is the screenshot of another App to guide you to do this.
Option 2: In case if above steps don't solve the issue, you may need to use Xposed Framework You need to Root your phone for this to work.
Read about the Xposed Framework and how to install it from here. Verify if your handset is supported. You may want to look at : Status Bar Icon Hider