Remove unnecessary code related to apply_delta from cycle detector (#3255)
Remove unnecessary code related to apply_delta from cycle detector (#3255)

With the merge of #3254 the other call to `apply_delta` are
unnecessary and there is also no longer a need to temporarily
store the `deltamap*` as a part of `view_t`.

This commit removes the calls to `apply_delta` and the `delta`
field from `view_t`.
kulibali/ponyc,cquinn/ponyc,sgebbie/ponyc,sgebbie/ponyc,dipinhora/ponyc,jemc/ponyc,jemc/ponyc,cquinn/ponyc,cquinn/ponyc,dipinhora/ponyc,kulibali/ponyc,kulibali/ponyc,ponylang/ponyc,sgebbie/ponyc,sgebbie/ponyc,kulibali/ponyc,dipinhora/ponyc,sgebbie/ponyc,cquinn/ponyc,jemc/ponyc,ponylang/ponyc,ponylang/ponyc