Cleanup .gitignore to contain only what's needed

.gitignore

@@ -1,7 +1,3 @@
-# Docs
-/_build/
-/docs/
-
 # Generated code
 /telethon/tl/functions/
 /telethon/tl/types/
@@ -11,98 +7,17 @@
 
 # User session
 *.session
-usermedia/
+/usermedia/
 
-# Quick tests should live in this file
+# Builds and testing
-example.py
-
-# Byte-compiled / optimized / DLL files
 __pycache__/
-*.py[cod]
+/dist/
-*$py.class
+/*.egg-info/
+/readthedocs/_build/
+/.tox/
 
-# C extensions
+# API reference docs
-*.so
+/docs/
 
-# Distribution / packaging
+# File used to manually test new changes, contains sensitive data
-.Python
+/example.py
-env/
-build/
-develop-eggs/
-dist/
-downloads/
-eggs/
-.eggs/
-lib/
-lib64/
-parts/
-sdist/
-var/
-*.egg-info/
-.installed.cfg
-*.egg
-
-# PyInstaller
-#  Usually these files are written by a python script from a template
-#  before PyInstaller builds the exe, so as to inject date/other infos into it.
-*.manifest
-*.spec
-
-# Installer logs
-pip-log.txt
-pip-delete-this-directory.txt
-
-# Unit test / coverage reports
-htmlcov/
-.tox/
-.coverage
-.coverage.*
-.cache
-nosetests.xml
-coverage.xml
-*,cover
-.hypothesis/
-
-# Translations
-*.mo
-*.pot
-
-# Django stuff:
-*.log
-local_settings.py
-
-# Flask stuff:
-instance/
-.webassets-cache
-
-# Scrapy stuff:
-.scrapy
-
-# Sphinx documentation
-/docs/_build/
-
-# PyBuilder
-target/
-
-# IPython Notebook
-.ipynb_checkpoints
-
-# pyenv
-.python-version
-
-# celery beat schedule file
-celerybeat-schedule
-
-# dotenv
-.env
-
-# virtualenv
-.venv/
-venv/
-ENV/
-
-# Spyder project settings
-.spyderproject
-
-# Rope project settings
-.ropeproject