docs: omit mention of Python 2.7 in 'CONTRIBUTING.rst' (#1127) (#205)

Closes #1126
Source-Link: googleapis/synthtool@b91f129
Post-Processor: gcr.io/repo-automation-bots/owlbot-python:latest@sha256:b6169fc6a5207b11800a7c002d0c5c2bc6d82697185ca12e666f44031468cfcd

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -1,3 +1,3 @@
 docker:
   image: gcr.io/repo-automation-bots/owlbot-python:latest
-  digest: sha256:c66ba3c8d7bc8566f47df841f98cd0097b28fff0b1864c86f5817f4c8c3e8600
+  digest: sha256:b6169fc6a5207b11800a7c002d0c5c2bc6d82697185ca12e666f44031468cfcd

CONTRIBUTING.rst

@@ -69,7 +69,6 @@ We use `nox <https://nox.readthedocs.io/en/latest/>`__ to instrument our tests.
 
 - To test your changes, run unit tests with ``nox``::
 
-    $ nox -s unit-2.7
     $ nox -s unit-3.8
     $ ...
 
@@ -144,17 +143,15 @@ Running System Tests
 
    # Run all system tests
    $ nox -s system-3.8
-   $ nox -s system-2.7
 
    # Run a single system test
    $ nox -s system-3.8 -- -k <name of test>
 
 
   .. note::
 
-      System tests are only configured to run under Python 2.7 and
-      Python 3.8. For expediency, we do not run them in older versions
-      of Python 3.
+      System tests are only configured to run under Python 3.8.
+      For expediency, we do not run them in older versions of Python 3.
 
   This alone will not run the tests. You'll need to change some local
   auth settings and change some configuration in your project to

docs/conf.py

@@ -80,9 +80,9 @@
 master_doc = "index"
 
 # General information about the project.
-project = u"google-cloud-asset"
-copyright = u"2019, Google"
-author = u"Google APIs"
+project = "google-cloud-asset"
+copyright = "2019, Google"
+author = "Google APIs"
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -281,7 +281,7 @@
     (
         master_doc,
         "google-cloud-asset.tex",
-        u"google-cloud-asset Documentation",
+        "google-cloud-asset Documentation",
         author,
         "manual",
     )
@@ -313,13 +313,7 @@
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
 man_pages = [
-    (
-        master_doc,
-        "google-cloud-asset",
-        u"google-cloud-asset Documentation",
-        [author],
-        1,
-    )
+    (master_doc, "google-cloud-asset", "google-cloud-asset Documentation", [author], 1,)
 ]
 
 # If true, show URL addresses after external links.
@@ -335,7 +329,7 @@
     (
         master_doc,
         "google-cloud-asset",
-        u"google-cloud-asset Documentation",
+        "google-cloud-asset Documentation",
         author,
         "google-cloud-asset",
         "google-cloud-asset Library",