Withdrawing from class that doesnt effect my major requirements

<p>So i recently got accepted into UCSB as a Business Economics major. I was required to take calc 1 and 2 which i completed accordingly. During my winter quarter at my community college I took Calc 3 for no reason at all and also listed it as planned course work i was going to take on my application. I withdrew from this class as the class/teacher was really difficult. My question is, will this truly effect UCSB's decision to ultimately not accept me into their school?
p.s - Im still suppose to notify them of any dropped classes regardless right?</p>