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I am doing the opposite. I took Google's advice and added more ad units to each and every page "as they suggested" --- and started running image based ads on a site "as they suggested".
I made more my first month with AdSense years ago than I'll make today.
Now I am lucky to take in a month what I would take in a week back then.
removing AdSense from my home page and other low-paying pages has increase my AdSense revenue.