Remove replace rule warning

Author: erikgeiser

README.md

@@ -18,13 +18,6 @@ and many opportunities for heavy customization.
 
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-**Warning:** This library depends on some significant [upsteam changes in bubbletea](https://github.com/charmbracelet/bubbletea/pull/120). Until they are merged you can use the following workaround in your project:
-
-```
-go mod edit -replace=github.com/charmbracelet/bubbletea=github.com/erikgeiser/bubbletea@cleanup_after_termination
-go mod tidy
-```
-
 **Disclaimer:** The API of library is not yet stable. Expect significant changes before 1.0.0.
 
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