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, 3 insertions, 10 deletions

diff --git a/tests/test-pearl-org-parse.el b/tests/test-pearl-org-parse.el
index e0bb967..731f6ef 100644
--- a/tests/test-pearl-org-parse.el
+++ b/tests/test-pearl-org-parse.el
@@ -30,15 +30,11 @@
 (require 'cl-lib)
 
 (defmacro test-pearl--in-org (content &rest body)
-  "Run BODY in an org-mode temp buffer holding CONTENT, default mapping bound."
+  "Run BODY in an org-mode temp buffer holding CONTENT."
   (declare (indent 1))
   ;; Declare the Linear keywords so `org-get-todo-state' recognizes them, the
   ;; way the generated file's `#+TODO:' line does in real use.
-  `(let ((pearl-state-to-todo-mapping
-          '(("Todo" . "TODO") ("In Progress" . "IN-PROGRESS") ("Done" . "DONE")))
-         (pearl-todo-states-pattern nil)
-         (pearl--todo-states-pattern-source nil)
-         (org-todo-keywords '((sequence "TODO" "IN-PROGRESS" "|" "DONE"))))
+  `(let ((org-todo-keywords '((sequence "TODO" "IN-PROGRESS" "|" "DONE"))))
      (with-temp-buffer
        (insert ,content)
        (org-mode)
@@ -107,10 +103,7 @@
   "An issue rendered by build-org-content parses back through the reader.
 Locks the render/parse contract: the LINEAR-* drawer the renderer writes is
 exactly what the reader extracts, and the rendered keyword is recognized."
-  (let ((pearl-state-to-todo-mapping '(("In Progress" . "IN-PROGRESS")))
-        (pearl-todo-states-pattern nil)
-        (pearl--todo-states-pattern-source nil)
-        (org-todo-keywords '((sequence "TODO" "IN-PROGRESS" "|" "DONE"))))
+  (let ((org-todo-keywords '((sequence "TODO" "IN-PROGRESS" "|" "DONE"))))
     (let ((content (pearl--build-org-content
                     '((:id "i-1" :identifier "ENG-2" :title "round trip"
                        :priority 2 :state (:name "In Progress") :team (:id "t-1"))))))