chore: removing owlbot directives for conversion to main (#680)

chore: removing owlbot directives for conversion to main

.github/.OwlBot.lock.yaml

@@ -1,3 +1,3 @@
 docker:
   image: gcr.io/repo-automation-bots/owlbot-python:latest
-  digest: sha256:1456ea2b3b523ccff5e13030acef56d1de28f21249c62aa0f196265880338fa7
+  digest: sha256:0ffe3bdd6c7159692df5f7744da74e5ef19966288a6bf76023e8e04e0c424d7d

CONTRIBUTING.rst

@@ -113,9 +113,9 @@ Coding Style
    export GOOGLE_CLOUD_TESTING_BRANCH="main"
 
   By doing this, you are specifying the location of the most up-to-date
-  version of ``python-aiplatform``. The the suggested remote name ``upstream``
-  should point to the official ``googleapis`` checkout and the
-  the branch should be the main branch on that remote (``main``).
+  version of ``python-aiplatform``. The
+  remote name ``upstream`` should point to the official ``googleapis``
+  checkout and the branch should be the default branch on that remote (``main``).
 
 - This repository contains configuration for the
   `pre-commit <https://pre-commit.com/>`__ tool, which automates checking

owlbot.py

@@ -90,59 +90,6 @@
         ".kokoro/**/*.cfg"
     ]
 )  # the microgenerator has a good coveragerc file
-# Remove the replacements below once https://github.com/googleapis/synthtool/pull/1188 is merged
-
-# Update googleapis/repo-automation-bots repo to main in .kokoro/*.sh files
-s.replace(".kokoro/*.sh", "repo-automation-bots/tree/master", "repo-automation-bots/tree/main")
-
-# Customize CONTRIBUTING.rst to replace master with main
-s.replace(
-    "CONTRIBUTING.rst",
-    "fetch and merge changes from upstream into master",
-    "fetch and merge changes from upstream into main",
-)
-
-s.replace(
-    "CONTRIBUTING.rst",
-    "git merge upstream/master",
-    "git merge upstream/main",
-)
-
-s.replace(
-    "CONTRIBUTING.rst",
-    """export GOOGLE_CLOUD_TESTING_BRANCH=\"master\"""",
-    """export GOOGLE_CLOUD_TESTING_BRANCH=\"main\"""",
-)
-
-s.replace(
-    "CONTRIBUTING.rst",
-    "remote \(``master``\)",
-    "remote (``main``)",
-)
-
-s.replace(
-    "CONTRIBUTING.rst",
-    "blob/master/CONTRIBUTING.rst",
-    "blob/main/CONTRIBUTING.rst",
-)
-
-s.replace(
-    "CONTRIBUTING.rst",
-    "blob/master/noxfile.py",
-    "blob/main/noxfile.py",
-)
-
-s.replace(
-    "**/docs/conf.py",
-    "master_doc",
-    "root_doc",
-)
-
-s.replace(
-    "**/docs/conf.py",
-    "# The master toctree document.",
-    "# The root toctree document.",
-)
 
 # Update samples config to use `ucaip-sample-tests` project
 s.replace(".kokoro/samples/python3.*/common.cfg",