Remove expr_without_variable

We no longer need this distinction.

Author: nikic

Zend/zend_language_parser.y

@@ -234,7 +234,7 @@ static YYSIZE_T zend_yytnamerr(char*, const char*);
 %type <ast> unprefixed_use_declarations const_decl inner_statement
 %type <ast> expr optional_expr while_statement for_statement foreach_variable
 %type <ast> foreach_statement declare_statement finally_statement unset_variable variable
-%type <ast> extends_from parameter optional_type argument expr_without_variable global_var
+%type <ast> extends_from parameter optional_type argument global_var
 %type <ast> static_var class_statement trait_adaptation trait_precedence trait_alias
 %type <ast> absolute_trait_method_reference trait_method_reference property echo_expr
 %type <ast> new_expr anonymous_class class_name class_name_reference simple_variable
@@ -871,8 +871,10 @@ new_expr:
 			{ $$ = $2; }
 ;
 
-expr_without_variable:
-		T_LIST '(' array_pair_list ')' '=' expr
+expr:
+		variable
+			{ $$ = $1; }
+	|	T_LIST '(' array_pair_list ')' '=' expr
 			{ $3->attr = ZEND_ARRAY_SYNTAX_LIST; $$ = zend_ast_create(ZEND_AST_ASSIGN, $3, $6); }
 	|	'[' array_pair_list ']' '=' expr
 			{ $2->attr = ZEND_ARRAY_SYNTAX_SHORT; $$ = zend_ast_create(ZEND_AST_ASSIGN, $2, $5); }
@@ -1100,11 +1102,6 @@ constant:
 			{ $$ = zend_ast_create(ZEND_AST_CLASS_CONST, $1, $3); }
 ;
 
-expr:
-		variable					{ $$ = $1; }
-	|	expr_without_variable		{ $$ = $1; }
-;
-
 optional_expr:
 		/* empty */	{ $$ = NULL; }
 	|	expr		{ $$ = $1; }