We don't need to import Data.Monoid because Prelude.Compat exports "<>"
already. In fact, importing that module causes build failures:
    Hledger/Read/Common.hs:725:62: error:
        Ambiguous occurrence ‘<>’
        It could refer to either ‘Sem.<>’,
                                 imported from ‘Prelude.Compat’ at Hledger/Read/Common.hs:97:1-39
                                 (and originally defined in ‘Data.Semigroup’)
                              or ‘Data.Monoid.<>’,
                                 imported from ‘Data.Monoid’ at Hledger/Read/Common.hs:110:1-18
Fixes https://github.com/simonmichael/hledger/issues/794.
		
	
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|---|---|---|
| .. | ||
| Common.hs | ||
| CsvReader.hs | ||
| JournalReader.hs | ||
| LedgerReader.hs.disabled | ||
| TimeclockReader.hs | ||
| TimedotReader.hs | ||