brew doctor complains unexpected dylibs '/usr/local/lib/libecomlodr.dylib', deletable?
The dynamic link file you see has been installed by something else, not homebrew. That's why it is "unexpected".

Unless you are having a problem installing something with homebrew the best thing to do is ignore it.

It's not easy (perhaps impossible) to know what may have put the file there or needs it there to run.