Remove implication that state/props are inherent arguments.

[bryanhelmig]

It feels very React-specific and unnecessary to label those arguments, so why not drop it?

[codecov-io]

Current coverage is 100.00%

Merging #68 into master will not affect coverage as of 0a53e98

@@            master     #68   diff @@
======================================
  Files            1       1       
  Stmts           41      41       
  Branches         0       0       
  Methods          0       0       
======================================
  Hit             41      41       
  Partial          0       0       
  Missed           0       0       

Review entire Coverage Diff as of 0a53e98

Powered by Codecov. Updated on successful CI builds.

[ellbee]

Thanks for the PR but we do actually need to label the arguments. See here : https://github.com/rackt/reselect/pull/40/files