Fix #3565: remove hledger support

hledger support in ledger-mode is incomplete. Perhaps we'll adopt
hledger-mode in the future? For now we'll just support ledger alone
instead of treading it as a fallback.

modules/lang/ledger/config.el

@@ -6,12 +6,6 @@
   (setq ledger-clear-whole-transactions 1
         ledger-mode-should-check-version nil)
 
-  :config
-  (setq ledger-binary-path
-        (if (executable-find "hledger")
-            "hledger"
-          "ledger"))
-
   (set-company-backend! 'ledger-mode 'company-capf)
 
   (defadvice! +ledger--check-version-a (orig-fn)