refactor!(parinfer): drop support for parinfer-mode

BREAKING CHANGE: It is no longer maintained, and its author directly
recommends `parinfer-rust-mode`.

Fix #4323

modules/editor/parinfer/config.el

@@ -1,31 +1,6 @@
 ;;; editor/parinfer/config.el -*- lexical-binding: t; -*-
 
-(use-package! parinfer
-  :unless (featurep! +rust)
-  :hook ((emacs-lisp-mode
-          clojure-mode
-          scheme-mode
-          lisp-mode
-          racket-mode
-          hy-mode) . parinfer-mode)
-  :init
-  (setq parinfer-extensions
-        '(defaults
-          pretty-parens
-          smart-tab
-          smart-yank))
-  (when (featurep! :editor evil +everywhere)
-    (push 'evil parinfer-extensions))
-  :config
-  (map! :map parinfer-mode-map
-        "\"" nil  ; smartparens handles this
-        :i "<tab>"     #'parinfer-smart-tab:dwim-right-or-complete
-        :i "<backtab>" #'parinfer-smart-tab:dwim-left
-        :localleader
-        "p" #'parinfer-toggle-mode))
-
 (use-package! parinfer-rust-mode
-  :when (featurep! +rust)
   :when (bound-and-true-p module-file-suffix)
   :hook ((emacs-lisp-mode
           clojure-mode

modules/editor/parinfer/doctor.el

@@ -1,6 +1,5 @@
 ;;; editor/parinfer/doctor.el -*- lexical-binding: t; -*-
 
-(when (featurep! +rust)
 (unless (fboundp 'module-load)
   (warn! "Your emacs wasn't built with dynamic modules support. `parinfer-rust-mode' won't work"))
 (when (and (eq system-type 'berkeley-unix)
@@ -8,4 +7,4 @@
                                          ".local/etc/parinfer-rust/libparinfer_rust.so"))))
   (warn! (concat "Could not read " user-emacs-directory
                  ".local/etc/parinfer-rust/libparinfer_rust.so. "
-                   "`parinfer-rust-mode' won't work"))))
+                 "`parinfer-rust-mode' won't work")))

modules/editor/parinfer/packages.el

@@ -1,18 +1,4 @@
 ;; -*- no-byte-compile: t; -*-
 ;;; editor/parinfer/packages.el
 
-(if (featurep! +rust)
 (package! parinfer-rust-mode :pin "c2c1bbec6cc7dad4f546868aa07609b8d58a78f8")
-  (when (featurep! :editor evil)
-    ;; Parinfer uses `evil-define-key' without loading evil, so if evil is
-    ;; installed *after* parinfer, parinfer will throw up void-function errors.
-    ;; because evil-define-key (a macro) wasn't expanded at compile-time. So we
-    ;; make sure evil is installed before parinfer...
-    (package! evil)
-    ;; ...and that it can see `evil-define-key' if evil was installed in a
-    ;; separate session:
-    (autoload 'evil-define-key "evil-core" nil nil 'macro))
-
-  (package! parinfer
-    :recipe (:host github :repo "emacsattic/parinfer")
-    :pin "8659c99a9475ee34af683fdf8f272728c6bebb3a"))