(Reuters) -A group of 22 U.S. states and territories have dropped their bid to block a proposed $10.3 billion settlement between 3M and U.S. public water providers that have accused the company of polluting drinking water with toxic chemicals. The states withdrew their objections late on Monday after negotiating changes with 3M and the water providers to the proposed deal, which would settle hundreds of lawsuits against the Minnesota-based company over perfluoroalkyl and polyfluoroalkyl substances, or PFAS, contamination. 3M, the water providers and the states said in a joint filing in feder...