Add removeAction again

[relund]

Modify the MDP: remove the maintain action in the states of stage 1

removeAction(mdp, sId=1, iA=0) # remove action 0 at the state with sId=1
removeAction(mdp, sId=2, iA=0)

Perform value iteration on the modified MDP

valueIte(mdp, w, termValues=scrapValues)
getPolicy(mdp) # optimal policy for each sId

resetActions(mdp) # reset the MDP such that all actions are used

Modify the weight of action 'buy'

setActionWeight(mdp, w=-50, sId=0, iA=0, wLbl=w)

Perform value iteration on the modified MDP

valueIte(mdp, w, termValues=scrapValues)
getPolicy(mdp) # optimal policy for each sId