chore: remove duplicate rustfmt

.rustfmt.toml

@@ -1,9 +0,0 @@
-tab_spaces = 4
-newline_style = "Auto"
-reorder_imports = true
-reorder_modules = true
-reorder_impl_items = false
-indent_style = "Block"
-normalize_comments = false
-imports_granularity = "Module"
-group_imports = "StdExternalCrate"