Personally, I would use a carbide (concrete) blade on a reciprocating saw to cut out one block at a time. The first block will be a real pain, but taking a hammer to the glass to chip these out sounds like a real dangerous mess.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
Last edited by villagetinker; 05-18-2023 at 04:42 PM.
Reason: missed a word
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