Remove support for octal literals

For the datetime stuff we need integer literals with leading zeros, and
surely there is not a single breathing person who has ever written an
octal literal in HQL.

hibernate-core/src/main/antlr/org/hibernate/grammars/hql/HqlLexer.g4

@@ -69,8 +69,6 @@ BIG_DECIMAL_LITERAL : FLOATING_POINT_NUMBER BIG_DECIMAL_SUFFIX;
 
 HEX_LITERAL : '0' [xX] HEX_DIGIT+ LONG_SUFFIX?;
 
-OCTAL_LITERAL : '0' ('0'..'7')+ ('l'|'L')?;
-
 fragment SINGLE_QUOTE : '\'';
 fragment DOUBLE_QUOTE : '"';
 
@@ -95,14 +93,6 @@ UNICODE_ESCAPE
 	: 'u' HEX_DIGIT HEX_DIGIT HEX_DIGIT HEX_DIGIT
 	;
 
-fragment
-OCTAL_ESCAPE
-	:	BACKSLASH ('0'..'3') ('0'..'7') ('0'..'7')
-	|	BACKSLASH ('0'..'7') ('0'..'7')
-	|	BACKSLASH ('0'..'7')
-	;
-
-
 // ESCAPE start tokens
 TIMESTAMP_ESCAPE_START : '{ts';
 DATE_ESCAPE_START : '{d';

hibernate-core/src/main/antlr/org/hibernate/grammars/hql/HqlParser.g4

@@ -508,7 +508,6 @@ literal
 	| DOUBLE_LITERAL
 	| BIG_DECIMAL_LITERAL
 	| HEX_LITERAL
-	| OCTAL_LITERAL
 	| NULL
 	| TRUE
 	| FALSE