fix: onesignal is duplicated (airbytehq#7565)

Author: harshithmullapudi

airbyte-config/init/src/main/resources/seed/source_definitions.yaml

@@ -601,11 +601,6 @@
   dockerRepository: airbyte/source-sentry
   dockerImageTag: 0.1.0
   documentationUrl: https://docs.airbyte.io/integrations/sources/sentry
-- sourceDefinitionId: bb6afd81-87d5-47e3-97c4-e2c2901b1cf8
-  name: OneSignal
-  dockerRepository: airbyte/source-onesignal
-  dockerImageTag: 0.1.0
-  documentationUrl: https://docs.airbyte.io/integrations/sources/lever-onesignal
 - name: Zoom
   sourceDefinitionId: aea2fd0d-377d-465e-86c0-4fdc4f688e51
   dockerRepository: airbyte/source-zoom-singer