Remove Smart Send out of experiment

[anthonykim1]

Now that smart send feature along with its setting to turn on and off, has been sitting in 100% experiment for awhile, we should take it out of the experiment.

[anthonykim1]

Verification steps:

1. Go to settings
2. Search for Python.REPL: Enable REPLSmart Send
3. Open existing Python file or create one of your choice with valid code (Python 3.8+)
4. Turn setting for smart send on and off to make sure you get the correct behavior.
5. Feel free to test with deprecated code (python2) to see you get a warning that tells you smart send can not be used.