update DESCRIPTION text to reflect deprecation of wav read functionality

DESCRIPTION

@@ -17,7 +17,7 @@ Authors@R: c(person("Vincent T","van Hees",role=c("aut","cre"),
              person("Medical Research Council UK",  role = c("cph", "fnd")),
              person("Accelting",  role = c("cph", "fnd")))
 Maintainer: Vincent T van Hees <v.vanhees@accelting.com>
-Description: Reads data collected from wearable acceleratometers as used in sleep and physical activity research. Currently supports file formats: binary data from 'GENEActiv' <https://activinsights.com/>, binary data from GENEA devices (not for sale), and .cwa-format and .wav-format data from 'Axivity' <https://axivity.com>. Primarily designed to complement R package GGIR <https://CRAN.R-project.org/package=GGIR>.
+Description: Reads data collected from wearable acceleratometers as used in sleep and physical activity research. Currently supports file formats: binary data from 'GENEActiv' <https://activinsights.com/>, .bin-format from GENEA devices (not for sale), and .cwa-format from 'Axivity' <https://axivity.com>. Primarily designed to complement R package GGIR <https://CRAN.R-project.org/package=GGIR>.
 URL: https://github.com/wadpac/GGIRread/
 BugReports: https://github.com/wadpac/GGIRread/issues
 License: Apache License (== 2.0)