Revert "'number' is a keyword on Oracle"

Unnecessary, since it isaregistered from JDBC metadata.

This reverts commit d9a807f237.

hibernate-core/src/main/java/org/hibernate/dialect/OracleDialect.java

@@ -289,12 +289,6 @@ public class OracleDialect extends Dialect {
 		}
 	}
 
-	@Override
-	protected void registerDefaultKeywords() {
-		super.registerDefaultKeywords();
-		registerKeyword( "number" );
-	}
-
 	@Override
 	public void initializeFunctionRegistry(FunctionContributions functionContributions) {
 		super.initializeFunctionRegistry(functionContributions);