README: don't mention go version in README

I forget to update it way too frequently.

Author: codesenberg

README.md

@@ -4,8 +4,6 @@ bombardier is a HTTP(S) benchmarking tool. It is written in Go programming langu
 
 With `bombardier v1.1` and higher you can now use `net/http` client if you need to test HTTP/2.x services or want to use a more RFC-compliant HTTP client.
 
-Tested on go1.18 and higher.
-
 ## Installation
 You can grab binaries in the [releases](https://github.com/codesenberg/bombardier/releases) section.
 Alternatively, to get latest and greatest run: