container: remove ledger in place of hledger

As said before; `lib_ledger` was meant to be a general abstraction to
any underlying CLI ledger.

But, between C++ `ledger` and Ledger Hardware Wallet, this abstraction
has become too confusing and counterproductive.

Since `hledger` will be the underlying implementation for the forseeable
future, all doubt should now be removed.

container/src/finance/finance.bash

@@ -113,17 +113,17 @@ function main()
     import)
       lib_finance::import "${@:3}"
       ;;
-    hledger | ledger)
-      lib_finance::ledger "${@:3}"
+    hledger)
+      lib_finance::hledger "${@:3}"
       ;;
-    hledger-ui | ledger-ui)
-      lib_finance::ledger-ui "${@:3}"
+    hledger-ui)
+      lib_finance::hledger-ui "${@:3}"
       ;;
-    hledger-vui | ledger-vui)
-      lib_finance::ledger-vui "${@:3}"
+    hledger-vui)
+      lib_finance::hledger-vui "${@:3}"
       ;;
-    hledger-web | ledger-web)
-      lib_finance::ledger-web "${@:3}"
+    hledger-web)
+      lib_finance::hledger-web "${@:3}"
       ;;
     meta)
       lib_finance::meta "${@:3}"