Update cheatsheets

tldr/pip3

@@ -5,33 +5,8 @@ source: https://github.com/tldr-pages/tldr.git
 ---
 # pip3
 
-> Python package manager.
-> More information: <https://pip.pypa.io>.
+> This command is an alias of `pip`.
 
-- Install a package:
+- View documentation for the original command:
 
-`pip3 install {{package}}`
-
-- Install a specific version of a package:
-
-`pip3 install {{package}}=={{version}}`
-
-- Upgrade a package:
-
-`pip3 install {{[-U|--upgrade]}} {{package}}`
-
-- Uninstall a package:
-
-`pip3 uninstall {{package}}`
-
-- Save the list of installed packages to a file:
-
-`pip3 freeze > {{requirements.txt}}`
-
-- Install packages from a file:
-
-`pip3 install {{[-r|--requirement]}} {{requirements.txt}}`
-
-- Show installed package info:
-
-`pip3 show {{package}}`
+`tldr pip`