refactor: remove the dead state-to-todo mapping subsystem

`pearl-state-to-todo-mapping` and its derived regex stopped doing real work once keyword rendering moved to slugifying the Linear state name (`pearl--state-name-to-keyword`) and the keyword-to-state direction moved to resolving through the team's workflow states. The defcustom fed only `pearl--get-todo-states-pattern`, which had no caller left, and the two cache vars existed only to serve that dead function. State extraction reads `org-get-todo-state` off the buffer's `#+TODO` line, so nothing live touched the mapping.

I removed the defcustom, both cache vars, and the dead function, and dropped the three pattern tests that exercised it. Removing the defcustom orphaned the mapping bindings that ~12 test setup macros still carried. They were passing through slugification rather than the map, so I stripped them too and kept the `org-todo-keywords` bindings the temp buffers actually need. Also dropped the stale README config row.

1 files changed, 2 insertions, 4 deletions

diff --git a/tests/test-pearl-org-write.el b/tests/test-pearl-org-write.el
index 6491b54..6c30380 100644
--- a/tests/test-pearl-org-write.el
+++ b/tests/test-pearl-org-write.el
@@ -33,12 +33,10 @@
   "One normalized issue, enough to render a recognizable org entry.")
 
 (defmacro test-pearl--with-org-file (var &rest body)
-  "Bind VAR to a fresh temp .org path and run BODY, cleaning up after.
-The state mapping is bound so rendering is deterministic."
+  "Bind VAR to a fresh temp .org path and run BODY, cleaning up after."
   (declare (indent 1))
   `(let* ((,var (make-temp-file "linear-test-" nil ".org"))
-          (pearl-org-file-path ,var)
-          (pearl-state-to-todo-mapping '(("Todo" . "TODO"))))
+          (pearl-org-file-path ,var))
      (unwind-protect
          (progn ,@body)
        (let ((b (find-buffer-visiting ,var)))