build: switch to GitHub app for releases (#396)

Author: Benjamin E. Coe

.github/release-please.yml

@@ -7,31 +7,3 @@ before_action {
     }
   }
 }
-
-# tokens used by release-please to keep an up-to-date release PR.
-before_action {
-  fetch_keystore {
-    keystore_resource {
-      keystore_config_id: 73713
-      keyname: "github-magic-proxy-key-release-please"
-    }
-  }
-}
-
-before_action {
-  fetch_keystore {
-    keystore_resource {
-      keystore_config_id: 73713
-      keyname: "github-magic-proxy-token-release-please"
-    }
-  }
-}
-
-before_action {
-  fetch_keystore {
-    keystore_resource {
-      keystore_config_id: 73713
-      keyname: "github-magic-proxy-url-release-please"
-    }
-  }
-}

.kokoro/continuous/node10/test.cfg

@@ -35,12 +35,3 @@ if npx check-node-version@3.3.0 --silent --node $COVERAGE_NODE; then
 else
   echo "coverage is only reported for Node $COVERAGE_NODE"
 fi
-
-# if release-please keys set, we kick off a task to update the release-PR.
-if [ -f ${KOKORO_KEYSTORE_DIR}/73713_github-magic-proxy-url-release-please ]; then
-  npx release-please release-pr --token=${KOKORO_KEYSTORE_DIR}/73713_github-magic-proxy-token-release-please \
-    --repo-url=googleapis/nodejs-error-reporting \
-    --package-name=@google-cloud/error-reporting \
-    --api-url=${KOKORO_KEYSTORE_DIR}/73713_github-magic-proxy-url-release-please \
-    --proxy-key=${KOKORO_KEYSTORE_DIR}/73713_github-magic-proxy-key-release-please
-fi