Revert "Add "incrementEventCountBy" function to OnboardingPrefs."

Revert submission 18500283-dismissEduCard

Reason for revert: Reverting because of build failures.
Reverted Changes:
I727cefb70:Save the value to sharedPreference When edu card i...
I180ab3bd6:Add "incrementEventCountBy" function to Onboarding...

Change-Id: Ia39781c78776a629d4678c78dd4ca75f49abbb6d
1 file changed