Remove n param from url

[shinyichen]

Remove n param from URL since it is not used anywhere and also doesn't corresponding to the actual page numbers in the results.

[thostetler]

This seems reasonable until we start doing more server side fetches from the API. 👍

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.1%. Comparing base (95059b0) to head (6b576bb).

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #734     +/-   ##
========================================
- Coverage    70.1%   70.1%   -0.0%     
========================================
  Files         218     218             
  Lines       24126   24124      -2     
  Branches     1287    1287             
========================================
- Hits        16896   16890      -6     
- Misses       7195    7199      +4     
  Partials       35      35             

Files with missing lines	Coverage Δ
src/utils/common/search.ts	95.5% <100.0%> (-<0.1%)	⬇️

... and 2 files with indirect coverage changes

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