remove AWS::Logs::LogGroup.RetentionInDays AllowedValues

[PatMyron]

AWS::Logs::LogGroup.RetentionInDays

fix #2603

resource provider schema has this value:

    "RetentionInDays" : {
      "description" : "The number of days to retain the log events in the specified log group. Possible values are: 1, 3, 5, 7, 14, 30, 60, 90, 120, 150, 180, 365, 400, 545, 731, 1096, 1827, and 3653.",
      "type" : "integer",
      "enum" : [ 1, 3, 5, 7, 14, 30, 60, 90, 120, 150, 180, 365, 400, 545, 731, 1096, 1827, 2192, 2557, 2922, 3288, 3653 ]
    },

so we should get rid of this old manually maintained list