[2108] Remove TODO list

src/lib/datasrc/memory/tests/memory_client_unittest.cc

@@ -738,10 +738,4 @@ TEST_F(MemoryClientTest, getJournalReaderNotImplemented) {
     EXPECT_THROW(client_->getJournalReader(Name("."), 0, 0),
                  isc::NotImplemented);
 }
-
-// TODO:
-// Add test for add() with separate_rrs=true
-// Add test for ZoneIterator variant of load()
-// Add test for leaks during allocation failures using TestMemorySegment
-// Iterate through an entire zone
 }