Deprecate versions < 2

README.md

@@ -16,20 +16,8 @@ rust-protobuf
 
 ## About versions and branches
 
-- `2.*.*` is the latest stable version. `2.*.*` versions follow semver conventions.
-- `1.7.*` is previous stable version
-- `1.6.*` was republished as `2.0.*` and no longer maintained. Should be compatible with `2.0.*`.
-  If you are using `1.6.*` please update to `2.0.*`.
-- `1.5.*` was republished as `1.7.*` and no longer maintained. Should be compatible with `1.7.*`.
-  If you are using `1.5.*` please update to `1.7.*`.
-
-`1.7+` `2.*` versions should follow semver conventions. However, if you are developing critical library
-it's probably better to specify version as `~2.0` (`>= 2.0` and `<= 2.1`), but not as `2.0` (`>= 2.0` and `<= 3.0`).
-
-Version `3.*` will **not** follow semver conventions, releases from master will be published as `3.*`.
-`3.*` branch can be considered experimental.
-
-Eventually some `3.*` version will be stable enough and will be re-released as `4.0`.
+- `2.*.*` is the latest stable version. `2.*.*` versions follow semver conventions
+- versions below `2` are no longer supported
 
 See [CHANGELOG.md](CHANGELOG.md) for a list of changes and compatility issues between versions.