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, 45 deletions

diff --git a/pearl.el b/pearl.el
index 5d7423a..0cac082 100644
--- a/pearl.el
+++ b/pearl.el
@@ -101,22 +101,6 @@ Defaults to \\='gtd/linear.org\\=' in your `org-directory'."
   :type 'file
   :group 'pearl)
 
-(defcustom pearl-state-to-todo-mapping
-  '(("Todo" . "TODO")
-    ("In Progress" . "IN-PROGRESS")
-    ("In Review" . "IN-REVIEW")
-    ("Backlog" . "BACKLOG")
-    ("Blocked" . "BLOCKED")
-    ("Done" . "DONE"))
-  "Mapping between Linear state names and Org TODO keywords, for rendering.
-Each element is a cons cell (LINEAR-STATE . ORG-STATE).  It controls how a
-Linear state renders as an Org TODO keyword and how an Org keyword maps back
-on sync.  It no longer decides which issues appear: inclusion is now a
-server-side query concern (see `pearl-list-issues').  A Linear state
-not listed here renders with the default TODO keyword."
-  :type '(alist :key-type string :value-type string)
-  :group 'pearl)
-
 (defcustom pearl-async-default t
   "Use async API calls by default.
 When t, all API calls will be asynchronous unless explicitly overridden.
@@ -283,17 +267,6 @@ not sprawl open.  A no-op when `pearl-fold-after-update' is nil."
                'org-set-startup-visibility))
     (pearl--hide-all-drawers)))
 
-(defvar pearl-todo-states-pattern nil
-  "Cached regex pattern for matching Org TODO states.
-This pattern is generated from `pearl-state-to-todo-mapping'.
-Use `pearl--get-todo-states-pattern' to get the pattern.")
-
-(defvar pearl--todo-states-pattern-source nil
-  "Mapping the cached pattern was built from.
-Holds the `pearl-state-to-todo-mapping' value used to build
-`pearl-todo-states-pattern', so the cache can be invalidated
-when the mapping changes.")
-
 ;; Cache variables
 
 (defvar pearl--cache-teams nil
@@ -1535,8 +1508,8 @@ there is no network lookup here."
 Upcased, each run of non-alphanumerics replaced by a single hyphen (alnum is
 Unicode-aware, so accented and non-Latin letters survive), with leading and
 trailing hyphens trimmed.  An all-symbol name (empty slug) falls back to
-\"TODO\".  This is the workspace-faithful replacement for the static
-`pearl-state-to-todo-mapping' lookup."
+\"TODO\".  This is the workspace-faithful replacement for the former static
+state-name-to-keyword mapping."
   (let ((slug (string-trim
                (replace-regexp-in-string "[^[:alnum:]]+" "-" (upcase (or name "")))
                "-+" "-+")))
@@ -1565,22 +1538,6 @@ file always has a valid `#+TODO:' line."
         (concat active-str " |"
                 (if (string-empty-p done-str) "" (concat " " done-str)))))))
 
-(defun pearl--get-todo-states-pattern ()
-  "Return the regex pattern matching the Org TODO states.
-Built from the org keywords in `pearl-state-to-todo-mapping' and
-cached in `pearl-todo-states-pattern'.  The cache is rebuilt when
-the mapping changes, so a mid-session `setq' or customization takes effect."
-  (unless (and pearl-todo-states-pattern
-               (eq pearl--todo-states-pattern-source
-                   pearl-state-to-todo-mapping))
-    ;; Pattern like "TODO\\|IN-PROGRESS\\|IN-REVIEW\\|BACKLOG\\|BLOCKED\\|DONE".
-    (setq pearl--todo-states-pattern-source pearl-state-to-todo-mapping
-          pearl-todo-states-pattern
-          (mapconcat #'regexp-quote
-                     (mapcar #'cdr pearl-state-to-todo-mapping)
-                     "\\|")))
-  pearl-todo-states-pattern)
-
 (defun pearl--map-linear-priority-to-org (priority-num)
   "Convert Linear PRIORITY-NUM to an Org priority cookie, or \"\" for none.
 PRIORITY-NUM is 0=None, 1=Urgent, 2=High, 3=Medium, 4=Low.  None (0), nil, and