Revert "[#30] Run formatters in project root"

This reverts commit 66777303dc.

See https://github.com/raxod502/apheleia/issues/36,
https://github.com/raxod502/apheleia/pull/37 for discussion.

CHANGELOG.md

@@ -4,11 +4,6 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog].
 
 ## Unreleased
-### Enhancements
-* Formatters are now run by default in the root directory of your
-  project (as defined by `project.el` or Projectile, defaulting to the
-  working directory). See [#30].
-
 ### Bugs fixed
 * Fix spelling error in generated process names ([#32]).
 

apheleia.el

@@ -25,35 +25,14 @@
 
 (require 'cl-lib)
 (require 'map)
-(require 'project)
 (require 'subr-x)
 
-(declare-function projectile-project-root "ext:projectile")
-
 (defgroup apheleia nil
   "Reformat buffer without moving point."
   :group 'external
   :link '(url-link :tag "GitHub" "https://github.com/raxod502/apheleia")
   :link '(emacs-commentary-link :tag "Commentary" "apheleia"))
 
-(defun apheleia--project-root ()
-  "Return the directory containing the current project.
-This is an absolute path ending in a slash. It uses `project' and
-then `projectile' (if the latter is installed), before falling
-back to `default-directory'."
-  (expand-file-name
-   (if-let ((project (project-current)))
-       ;; `project-roots' was replaced with `project-root' in Emacs
-       ;; 28, and the former function deprecated. Use whichever one is
-       ;; available and non-deprecated.
-       (with-no-warnings
-         (if (fboundp 'project-root)
-             (project-root project)
-           (car (project-roots project))))
-     (or (and (require 'projectile nil 'noerror)
-              (projectile-project-root))
-         default-directory))))
-
 (cl-defun apheleia--edit-distance-table (s1 s2)
   "Align strings S1 and S2 for minimum edit distance.
 Return the dynamic programming table as has table which maps cons
@@ -458,7 +437,6 @@ modified from what is written to disk, then don't do anything."
                                     output-fname
                                   arg))
                               command)))
-      (let ((default-directory (apheleia--project-root)))
       (apheleia--make-process
        :command command
        :stdin (unless input-fname
@@ -467,7 +445,7 @@ modified from what is written to disk, then don't do anything."
                    (when output-fname
                      (erase-buffer)
                      (insert-file-contents-literally output-fname))
-                     (funcall callback stdout)))))))
+                   (funcall callback stdout))))))
 
 (defcustom apheleia-formatters
   '((black . ("black" "-"))