libsnapshot: Remove misleading message

If we read up to a label, this error message is unneeded, and if we
don't, we already return an error message before this, leaving the old
message as entirely redundant and misleading.

Test: Run, verify "No COW Footer, recovered data" does not show in logs
Bug: 172026020
Change-Id: I31d054ccf898cf93c71ff201f0868e57cd1a6135

fs_mgr/libsnapshot/cow_reader.cpp

@@ -222,8 +222,6 @@ bool CowReader::ParseOps(std::optional<uint64_t> label) {
             LOG(ERROR) << "ops checksum does not match";
             return false;
         }
-    } else {
-        LOG(INFO) << "No COW Footer, recovered data";
     }
 
     ops_ = ops_buffer;