Backing out build tag for suggestions per recommendation

from @kolyshkin 🙇

README.md

@@ -59,22 +59,12 @@ import (
 
 You can use the following build tags:
 
-#### `urfave_cli_core`
-
-When set, applies all `urfave_cli_no.+` build tags to minimize resulting binary
-size.
-
 #### `urfave_cli_no_docs`
 
 When set, this removes `ToMarkdown` and `ToMan` methods, so your application
 won't be able to call those. This reduces the resulting binary size by about
 300-400 KB (measured using Go 1.18.1 on Linux/amd64), due to fewer dependencies.
 
-#### `urfave_cli_no_suggest`
-
-When set, the capability enabled by setting `App.Suggest` will be a no-op. This
-reduces the resulting binary size due to fewer dependencies.
-
 ### GOPATH
 
 Make sure your `PATH` includes the `$GOPATH/bin` directory so your commands can