Remove "Use Advanced Search Syntax" option from Search Portlet in 7.0.x. It was accidentally backported

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X
• Fix Version/s: 7.0.0 DXP FP56, 7.0.0 DXP SP9, 7.0.X
• Component/s: Web Search > Search Widgets
• Labels:
  • 7.0.x-only
  • ee-7.0.x-only
  • liferay-dxp-70-sp9
  • liferay-fixpack-de-56-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/liferay/liferay-portal-ee/pull/8897

Master/7.1.x: The feature intentionally exists in 7.1, no need to remove.

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We accidentally backported LPS-72589 (which adds support for Lucene syntax to the Search Portlet) to 7.0.x as part of the Elasticsearch 6 dependencies.

Since it's a new feature and was never developed for 7.0.x, the Search Team decided to remove it from 7.0.x

1. Start FP42+
2. Go to Search Portlet > Configuration - Other Settings
   "Use Advanced Search Syntax" option is there.