Drop quote marks in error messages

Author: TimWolla

Zend/tests/closure_const_expr/disallows_non_static.phpt

@@ -15,4 +15,4 @@ var_dump($foo->d);
 
 ?>
 --EXPECTF--
-Fatal error: Closures in constant expressions must be "static" in %s on line %d
+Fatal error: Closures in constant expressions must be static in %s on line %d

Zend/tests/closure_const_expr/disallows_using_variables.phpt

@@ -14,4 +14,4 @@ var_dump(Closure);
 
 ?>
 --EXPECTF--
-Fatal error: Cannot "use(...)" variables in constant expression in %s on line %d
+Fatal error: Cannot use(...) variables in constant expression in %s on line %d

Zend/zend_compile.c

@@ -11190,11 +11190,11 @@ static void zend_compile_const_expr_closure(zend_ast **ast_ptr)
 	zend_ast *uses_ast = closure_ast->child[1];
 	if (!(closure_ast->flags & ZEND_ACC_STATIC)) {
 		zend_error_noreturn(E_COMPILE_ERROR,
-			"Closures in constant expressions must be \"static\"");
+			"Closures in constant expressions must be static");
 	}
 	if (uses_ast) {
 		zend_error_noreturn(E_COMPILE_ERROR,
-			"Cannot \"use(...)\" variables in constant expression");
+			"Cannot use(...) variables in constant expression");
 	}
 
 	znode node;