"Thank you," "Thank you in advance," or "hey!" or "Hi!" or "hellowwwww" or "hello" or "hello, my name is this and that and I do this and that....and blah blah blah." These are the things I remove first. Totally/completely/absolutely irrelevant. Takes up space(especially when using mobile). Doesn't help us in answering. I believe that we are here by ourselves. No once called us to write answers/comments. So, there is no point in saying 'thank you" or whatever sign of politeness. But, I rarely remove "I live in [country]" because that helps. + what ColleenV said.