remove books table from postgres

reporting/Pg.cpp

@@ -841,15 +841,6 @@ create table if not exists account_transactions5 partition of account_transactio
 create table if not exists account_transactions6 partition of account_transactions for values from (50000000) to (60000000);
 create table if not exists account_transactions7 partition of account_transactions for values from (60000000) to (70000000);
 
--- Table that maps a book to a list of offers in that book. Deletes from the ledger table
--- cascade here based on ledger_seq.
-CREATE TABLE IF NOT EXISTS books (
-    ledger_seq bigint NOT NULL,
-    book bytea NOT NULL,
-    offer_key bytea NOT NULL
-);
-
-CREATE INDEX book_idx ON books using btree(ledger_seq, book, offer_key);
 
 CREATE TABLE IF NOT EXISTS keys (
     ledger_seq bigint NOT NULL, 

reporting/PostgresBackend.cpp

@@ -643,9 +643,6 @@ PostgresBackend::doFinishWrites() const
         std::string keysStr = keysBuffer_.str();
         if (keysStr.size())
             writeConnection_.bulkInsert("keys", keysStr);
-        std::string booksStr = booksBuffer_.str();
-        if (booksStr.size())
-            writeConnection_.bulkInsert("books", booksStr);
     }
     auto res = writeConnection_("COMMIT");
     if (!res || res.status() != PGRES_COMMAND_OK)
@@ -658,8 +655,6 @@ PostgresBackend::doFinishWrites() const
     transactionsBuffer_.clear();
     objectsBuffer_.str("");
     objectsBuffer_.clear();
-    booksBuffer_.str("");
-    booksBuffer_.clear();
     keysBuffer_.str("");
     keysBuffer_.clear();
     accountTxBuffer_.str("");

reporting/PostgresBackend.h

@@ -9,7 +9,6 @@ class PostgresBackend : public BackendInterface
 private:
     mutable size_t numRowsInObjectsBuffer_ = 0;
     mutable std::stringstream objectsBuffer_;
-    mutable std::stringstream booksBuffer_;
     mutable std::stringstream keysBuffer_;
     mutable std::stringstream transactionsBuffer_;
     mutable std::stringstream accountTxBuffer_;