remove save-window-excursion

Author: brotzeit

rust-rustfmt.el

@@ -332,10 +332,9 @@ Return the created process."
   ;; preserve location and markers in buffer, otherwise we can try to
   ;; save locations as best we can, though we still lose markers.
   (save-excursion
-    (save-window-excursion
-      (if (version<= "26.2" emacs-version)
-          (rust--format-buffer-using-replace-buffer-contents)
-        (rust--format-buffer-saving-position-manually)))))
+    (if (version<= "26.2" emacs-version)
+        (rust--format-buffer-using-replace-buffer-contents)
+      (rust--format-buffer-saving-position-manually))))
 
 (defun rust-enable-format-on-save ()
   "Enable formatting using rustfmt when saving buffer."