refactor($location): remove unused arguments

There were number unused function arguments around appBase. Those got uncovered as soon as you realise that the `base` argument isn't used in the `urlResolve` function: 
https://github.com/angular/angular.js/blob/50e72fcae143ffa9f519a435278a1319e2cdb5c0/src/ng/urlUtils.js#L65