Fix #5030: leave rustfmt to :editor format

modules/editor/format/config.el

@@ -5,7 +5,6 @@
         sql-mode           ; sqlformat is currently broken
         tex-mode           ; latexindent is broken
         latex-mode
-        rustic-mode        ; handled by `rustic-rustfmt'
         org-msg-edit-mode) ; doesn't need a formatter
   "A list of major modes in which to reformat the buffer upon saving.
 

modules/lang/rust/config.el

@@ -20,8 +20,7 @@
   (set-popup-rule! "^\\*rustic-compilation" :vslot -1)
 
   ;; Leave automatic reformatting to the :editor format module.
-  (set-formatter! 'rustfmt #'rustic-format-buffer :modes '(rustic-mode))
-  (setq rustic-babel-format-src-block (featurep! :editor format +onsave)
+  (setq rustic-babel-format-src-block nil
         rustic-format-trigger nil)
 
   ;; HACK `rustic-flycheck' adds all these hooks in disruptive places. Instead,