Apparently our intel network was really good during the 80's and early 90's...Al qaida was already quite weak due to US invasion of Afghanistan and war on terror, Osama was hardly that important, other than being the mastermind of 9/11 and being America's enemy. They were not really affected by his death.
Realistically, we do not have the resources and clout the US have to assassinate a Pakistani citizen in its own soil and not be affected by Political fallout.
Then I.K Gujaral great statesman happened...