fix(guide): simplify directory structure

guide/english/bash/bash-rm/index.md

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+---
+title: Bash rm
+---
+
+## Bash command: rm
+
+**Delete a File/Directory** ,for example `rm hello`.
+
+There are few commonly used arguments:
+
+- `r` , means to recursively delete all the folders inside a directory.
+- `f` , means to forcefully delete anything folder or file.
+
+### More Information:
+* [Wikipedia](https://en.wikipedia.org/wiki/Rm_(Unix))