Merge branch 'some_code_cleanup' of https://github.com/akalongman/php-telegram-bot into some_code_cleanup

# Via Armando Lüscher (1) and Marco Boretto (1)
* 'some_code_cleanup' of https://github.com/akalongman/php-telegram-bot:
  Clean Admin commands, removing all unnecessary or unused code.
  Small typo fixes.
  Remove all unused `use` definitions.
  Remove any unnecessary code from commands. Changes include: - Removed the definitions of member variables that had the same values as their inherited defaults. These can be removed since the default values apply anyway. - Removed superfluous code form execute command.

Conflicts:
	src/Admin/ChatsCommand.php
	src/Admin/SendtoallCommand.php
	src/Admin/SendtochannelCommand.php
	src/Commands/ChannelchatcreatedCommand.php
	src/Commands/ChoseninlineresultCommand.php
	src/Commands/DateCommand.php
	src/Commands/DeletechatphotoCommand.php
	src/Commands/EchoCommand.php
	src/Commands/GenericCommand.php
	src/Commands/GenericmessageCommand.php
	src/Commands/GroupchatcreatedCommand.php
	src/Commands/HelpCommand.php
	src/Commands/InlinequeryCommand.php
	src/Commands/LeftchatparticipantCommand.php
	src/Commands/NewchatparticipantCommand.php
	src/Commands/NewchattitleCommand.php
	src/Commands/SlapCommand.php
	src/Commands/StartCommand.php
	src/Commands/SupergroupchatcreatedCommand.php
	src/Commands/WeatherCommand.php
	src/Commands/WhoamiCommand.php