Remove .gitignore

When proposing the patch [1] to retire panko deliverables in governance
repository, the validator fails as there should be only .gitreview and
README.rst in the retired repository. This patch cleans up .gitignore
file to make the validator pass.

[1] I0bec371f442c4e39557bf1f0d94697e1577bb838

Change-Id: I5cc65714c6e0eaf835d321f4dd48501167182568

.gitignore

@@ -1,58 +0,0 @@
-*.py[cod]
-
-# C extensions
-*.so
-
-# Packages
-*.egg
-*.egg-info
-dist
-build
-.eggs
-eggs
-parts
-bin
-var
-sdist
-develop-eggs
-.installed.cfg
-lib
-lib64
-
-# Installer logs
-pip-log.txt
-
-# Unit test / coverage reports
-.coverage
-.tox
-nosetests.xml
-.testrepository
-.venv
-
-# Translations
-*.mo
-
-# Mr Developer
-.mr.developer.cfg
-.project
-.pydevproject
-
-# Complexity
-output/*.html
-output/*/index.html
-
-# Sphinx
-doc/build
-releasenotes/build
-
-# pbr generates these
-AUTHORS
-ChangeLog
-
-# Editors
-*~
-.*.swp
-.*sw?
-
-# generated docs
-doc/source/ref/

README.rst

@@ -1,7 +1,7 @@
 The contents of this repository are still available in the Git source
 code management system. To see the contents of this repository before it
 reached its end of life, please check out the previous commit with
-"git checkout HEAD^1".
+"git checkout HEAD^2".
 
 For any further questions, please email
 openstack-discuss@lists.openstack.org or join #openstack-telemetry on OFTC.