rdbms: Drop IDatabase::aggregateValue()

Unused

Bug: T296960
Change-Id: I098d8e8d47709d2c754c1bb107a9a57e811ec6f4

RELEASE-NOTES-1.38

@@ -263,6 +263,7 @@ because of Phabricator reports.
   - ::preCommitCallbacksPending()
   - ::pendingWriteRowsAffected()
   - ::getServerUptime()
+  - ::aggregateValue()
 * …
 
 === Deprecations in 1.38 ===

includes/libs/rdbms/database/DBConnRef.php

@@ -390,10 +390,6 @@ class DBConnRef implements IDatabase {
 		return $this->__call( __FUNCTION__, func_get_args() );
 	}
 
-	public function aggregateValue( $valuedata, $valuename = 'value' ) {
-		return $this->__call( __FUNCTION__, func_get_args() );
-	}
-
 	public function bitNot( $field ) {
 		return $this->__call( __FUNCTION__, func_get_args() );
 	}

includes/libs/rdbms/database/Database.php

@@ -2844,14 +2844,6 @@ abstract class Database implements IDatabase, IMaintainableDatabase, LoggerAware
 		return $result;
 	}
 
-	/**
-	 * @inheritDoc
-	 * @stable to override
-	 */
-	public function aggregateValue( $valuedata, $valuename = 'value' ) {
-		return $valuename;
-	}
-
 	/**
 	 * @inheritDoc
 	 * @stable to override

includes/libs/rdbms/database/DatabasePostgres.php

@@ -802,10 +802,6 @@ __INDEXATTR__;
 		return $output;
 	}
 
-	public function aggregateValue( $valuedata, $valuename = 'value' ) {
-		return $valuedata;
-	}
-
 	public function getSoftwareLink() {
 		return '[{{int:version-db-postgres-url}} PostgreSQL]';
 	}

includes/libs/rdbms/database/IDatabase.php

@@ -1091,17 +1091,6 @@ interface IDatabase {
 	 */
 	public function factorConds( $condsArray );
 
-	/**
-	 * Return aggregated value alias
-	 *
-	 * @param array $valuedata
-	 * @param string $valuename
-	 *
-	 * @return array|string
-	 * @deprecated Since 1.33
-	 */
-	public function aggregateValue( $valuedata, $valuename = 'value' );
-
 	/**
 	 * @param string|int $field
 	 * @return string