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, 6 insertions, 45 deletions

diff --git a/tests/test-pearl-mapping.el b/tests/test-pearl-mapping.el
index b5faa3d..1207bf0 100644
--- a/tests/test-pearl-mapping.el
+++ b/tests/test-pearl-mapping.el
@@ -20,56 +20,17 @@
 ;;; Commentary:
 
 ;; Unit tests for the pure mapping helpers in pearl.el:
-;; Linear state <-> org keyword, the cached TODO-states regex, and
-;; Linear priority -> org cookie / readable name.
+;; Linear priority -> org cookie / readable name, and the priority list.
 
 ;;; Code:
 
 (require 'test-bootstrap (expand-file-name "test-bootstrap.el"))
 
-;; A small, explicit mapping used across the state tests so cases don't
-;; depend on the package default.
-(defmacro test-pearl--with-mapping (mapping &rest body)
-  "Run BODY with the state mapping bound to MAPPING and the cache cleared."
-  (declare (indent 1))
-  `(let ((pearl-state-to-todo-mapping ,mapping)
-         (pearl-todo-states-pattern nil)
-         (pearl--todo-states-pattern-source nil))
-     ,@body))
-
-;; pearl--map-linear-state-to-org (the static name->keyword lookup) was removed
-;; in the keyword-cycle save: the keyword is now always the slug of the state
-;; name (`pearl--state-name-to-keyword'), matching the workspace-derived #+TODO
-;; header, and the keyword->state-id direction resolves through the team's
-;; states (`pearl--resolve-keyword-to-state'), not a flat mapping.  The mapping
-;; alist itself survives only as the source for `pearl--get-todo-states-pattern'
-;; (tested below).
-
-;;; pearl--get-todo-states-pattern
-
-(ert-deftest test-pearl-get-todo-states-pattern-builds-alternation ()
-  "The pattern is the org keywords joined with regex alternation."
-  (test-pearl--with-mapping '(("Todo" . "TODO") ("In Progress" . "IN-PROGRESS") ("Done" . "DONE"))
-    (should (string-equal "TODO\\|IN-PROGRESS\\|DONE"
-                          (pearl--get-todo-states-pattern)))))
-
-(ert-deftest test-pearl-get-todo-states-pattern-empty-mapping ()
-  "An empty mapping yields an empty pattern string."
-  (test-pearl--with-mapping '()
-    (should (string-equal "" (pearl--get-todo-states-pattern)))))
-
-(ert-deftest test-pearl-get-todo-states-pattern-recomputes-after-mapping-change ()
-  "The cached pattern is recomputed when the mapping changes mid-session.
-
-Regression for the stale-cache bug: a once-populated pattern must not
-outlive a change to `pearl-state-to-todo-mapping'."
-  (test-pearl--with-mapping '(("Todo" . "TODO") ("Done" . "DONE"))
-    (should (string-equal "TODO\\|DONE" (pearl--get-todo-states-pattern)))
-    ;; Change the mapping after the pattern has been cached.
-    (setq pearl-state-to-todo-mapping
-          '(("Todo" . "TODO") ("In Progress" . "DOING") ("Done" . "DONE")))
-    (should (string-equal "TODO\\|DOING\\|DONE"
-                          (pearl--get-todo-states-pattern)))))
+;; The static Linear-state -> Org-keyword mapping and its derived regex were
+;; removed once keyword rendering moved to slugifying the state name
+;; (`pearl--state-name-to-keyword'), and the keyword -> state-id direction moved
+;; to resolving through the team's states (`pearl--resolve-keyword-to-state').
+;; What remains pure-mapping-shaped is the priority conversion, tested below.
 
 ;;; pearl--map-linear-priority-to-org