index: remove txindex references from base index

src/index/base.h

@@ -40,10 +40,10 @@ protected:
         DB(const fs::path& path, size_t n_cache_size,
            bool f_memory = false, bool f_wipe = false, bool f_obfuscate = false);
 
-        /// Read block locator of the chain that the txindex is in sync with.
+        /// Read block locator of the chain that the index is in sync with.
         bool ReadBestBlock(CBlockLocator& locator) const;
 
-        /// Write block locator of the chain that the txindex is in sync with.
+        /// Write block locator of the chain that the index is in sync with.
         void WriteBestBlock(CDBBatch& batch, const CBlockLocator& locator);
     };