account table is being automatic from now on

common/proto/table_definition.proto

@@ -55,10 +55,6 @@ message TableLink {
   // Otherwise the column allows NULL.
   // Duplicate links to the same target table in one request are rejected.
   bool required = 2;
-
-  // User-defined column read from this linked row as the journal account.
-  // Exactly one required link must set this when the table contains ACCOUNTING.
-  string account_value_column = 3;
 }
 
 // Defines the input for creating a new table definition.
@@ -183,9 +179,8 @@ message ColumnDefinition {
   //   TIME (timezone-free time of day)
   //   MONEY (= unconstrained NUMERIC; currency comes from the table)
   //   ACCOUNTING (creates schema-managed name, debit, and credit columns;
-  //               the table creator must separately provide a column named account
-  //               with any supported type or a required link to a table named account;
-  //               linked accounts post the linked row's configured display value;
+  //               automatically creates a required accounts_id link and posts
+  //               the referenced canonical account row's account value;
   //               name is limited to 10 characters and one stored row contributes
   //               one line to the profile journal)
   //   INT