refactor!(elixir): remove alchemist

BREAKING CHANGE: alchemist appears to be unmaintained and has reportedly
been replaced by elixir-ls and LSP (#5488). To restore your Elixir dev
environemnt, enable :lang (elixir +lsp) and install elixir-ls via your
package manager or 'M-x lsp-install-server'.

Close: #5488

modules/lang/elixir/README.org

@@ -4,8 +4,7 @@
 #+since:    2.0.3 (#83)
 
 * Description :unfold:
-This module provides support for [[https://elixir-lang.org/][Elixir programming language]] via [[doom-package:alchemist]] or
+This module provides support for [[https://elixir-lang.org/][Elixir programming language]] via [[https://github.com/elixir-lsp/elixir-ls/][elixir-ls]].
-[[https://github.com/elixir-lsp/elixir-ls/][elixir-ls]].
 
 ** Maintainers
 /This module has no dedicated maintainers./ [[doom-contrib-maintainer:][Become a maintainer?]]
@@ -19,7 +18,6 @@ This module provides support for [[https://elixir-lang.org/][Elixir programming
   editing. Requires [[doom-module::tools tree-sitter]].
 
 ** Packages
-- [[doom-package:alchemist]]
 - [[doom-package:elixir-mode]]
 - [[doom-package:exunit]]
 - [[doom-package:flycheck-credo]] if [[doom-module::checkers syntax]]

modules/lang/elixir/config.el

@@ -56,39 +56,6 @@
   :config (flycheck-credo-setup))
 
 
-(use-package! alchemist
-  :hook (elixir-mode . alchemist-mode)
-  :config
-  (set-lookup-handlers! 'elixir-mode
-    :definition #'alchemist-goto-definition-at-point
-    :documentation #'alchemist-help-search-at-point)
-  (set-eval-handler! 'elixir-mode #'alchemist-eval-region)
-  (set-repl-handler! 'elixir-mode #'alchemist-iex-project-run)
-  (map! :after elixir-mode
-        :localleader
-        :map elixir-mode-map
-        "m" #'alchemist-mix
-        "c" #'alchemist-mix-compile
-        "i" #'alchemist-iex-project-run
-        "f" #'elixir-format
-        (:prefix ("e" . "eval")
-         "e" #'alchemist-iex-send-last-sexp
-         "r" #'alchemist-iex-send-region
-         "l" #'alchemist-iex-send-current-line
-         "R" #'alchemist-iex-reload-module)))
-
-
-(use-package! alchemist-company
-  :when (modulep! :completion company)
-  :commands alchemist-company
-  :config
-  (set-company-backend! 'alchemist-mode '(alchemist-company company-yasnippet))
-  ;; Alchemist doesn't use hook symbols to add these backends, so we have to use
-  ;; the entire closure to get rid of it.
-  (let ((fn (byte-compile (lambda () (add-to-list (make-local-variable 'company-backends) 'alchemist-company)))))
-    (remove-hook 'alchemist-mode-hook fn)
-    (remove-hook 'alchemist-iex-mode-hook fn)))
-
 (use-package! exunit
   :hook (elixir-mode . exunit-mode)
   :init

modules/lang/elixir/packages.el

@@ -3,7 +3,6 @@
 
 ;; +elixir.el
 (package! elixir-mode :pin "7641373f0563cab67cc5459c34534a8176b5e676")
-(package! alchemist :pin "6f99367511ae209f8fe2c990779764bbb4ccb6ed")
 (package! exunit :pin "e0a8c2b81f3d53885ed753b911b3cb6ee9229bec")
 (when (modulep! :checkers syntax)
   (package! flycheck-credo :pin "e88f11ead53805c361ec7706e44c3dfee1daa19f"))