got rid of a few unused variable warnings

src/rcldb/rclabsfromtext.cpp

@@ -344,8 +344,6 @@ int Query::Native::abstractFromText(
     Chrono&
     )
 {
-    Xapian::Database& xrdb(ndb->xrdb);
-
     string rawtext;
     if (!ndb->getRawText(docid, rawtext)) {
         LOGDEB0("abstractFromText: can't fetch text\n");

src/rcldb/rclabstract.cpp

@@ -636,7 +636,6 @@ int Query::Native::makeAbstract(Xapian::docid docid,
     }
 
     Rcl::Db::Native *ndb(m_q->m_db->m_ndb);
-    Xapian::Database& xrdb(ndb->xrdb);
 
     // Total number of slots we populate. The 7 is taken as
     // average word size. It was a mistake to have the user max

src/rcldb/rclterms.cpp

@@ -374,7 +374,7 @@ bool Db::Native::idxTermMatch_p(
             Xapian::TermIterator it = xdb.allterms_begin(); 
             if (!is.empty())
                 it.skip_to(is.c_str());
-            for (int rcnt = 0; it != xdb.allterms_end(); it++) {
+            for (; it != xdb.allterms_end(); it++) {
                 const string ixterm{*it};
                 // If we're beyond the terms matching the initial
                 // section, end