Merge pull request #2208 from Automattic/update/search-schema-index

Remove index removal

search/includes/classes/queue/class-schema.php

@@ -139,12 +139,6 @@ protected function _prepare_table() {
 		$table_count = count( $wpdb->get_col( $wpdb->prepare( 'SHOW TABLES LIKE %s', $table_name ) ) );
 
 		if ( 1 === $table_count ) {
-			// Between version 2 and 3, we added the `index_version` column, which is part of the unique index, so need to drop the old index
-			// (which doesn't happen automatically in dbDelta, sadly)
-			if ( 3 === self::DB_VERSION ) {
-				$wpdb->query( "DROP INDEX IF EXISTS `unique_object_and_status` on $table_name" ); // Cannot prepare table name. @codingStandardsIgnoreLine
-			}
-
 			set_transient( self::DB_VERSION_TRANSIENT, self::DB_VERSION, self::DB_VERSION_TRANSIENT_TTL );
 		} else {
 			trigger_error( esc_html( "VIP Search Queue index table ($table_name) not found after dbDelta()" ), \E_USER_WARNING );