all: remove any type future implementation reference (#18822)

Author: felipensp

vlib/v/checker/tests/struct_field_with_any_type_err.out

@@ -1,4 +1,4 @@
-vlib/v/checker/tests/struct_field_with_any_type_err.vv:2:6: error: cannot use `any` type here, `any` will be implemented in V 0.4
+vlib/v/checker/tests/struct_field_with_any_type_err.vv:2:6: error: cannot use `any` type here
     1 | struct My_type {
     2 |     fld any
       |         ~~~

vlib/v/parser/parse_type.v

@@ -649,7 +649,7 @@ fn (mut p Parser) parse_any_type(language ast.Language, is_ptr bool, check_dot b
 					}
 					'any' {
 						if p.file_backend_mode != .js && p.mod != 'builtin' {
-							p.error('cannot use `any` type here, `any` will be implemented in V 0.4')
+							p.error('cannot use `any` type here')
 						}
 						ret = ast.any_type
 					}

vlib/v/parser/tests/cast_to_any_type_err.out

@@ -1,4 +1,4 @@
-vlib/v/parser/tests/cast_to_any_type_err.vv:2:7: error: cannot use `any` type here, `any` will be implemented in V 0.4
+vlib/v/parser/tests/cast_to_any_type_err.vv:2:7: error: cannot use `any` type here
     1 | fn main() {
     2 |     a := any(22)
       |          ~~~