Remove backwards compat aliases from PR 10593 (#12195)
Removes code provided for backwards compatibility in PR #10593
### Summary of the issue:
PR #10593 introduced `speech.speakWithoutPauses ` as an alias for `speech._speakWithoutPauses.speakWithoutPauses` and `speech.re_last_pause` as an alias for `speech._speakWithoutPauses.re_last_pause` for backwards compatibility. Since 2021.1 is going to be backwards compatibility breaking release it makes sense to remove these.
### Description of how this pull request fixes the issue:
These aliases are removed and their usages are replaces with `speech.SpeechWithoutPauses(speakFunc=speech.speak).speakWithoutPauses` and `speech.SpeechWithoutPauses.re_last_pause` respectively.
