removed "usually" from cfr_time_varying Details doc

R/cfr_time_varying.R

@@ -50,9 +50,9 @@
 #'
 #' The epidemiological delay distribution passed to `delay_density` is used to
 #' obtain a probability mass function parameterised by time; i.e. \eqn{f(t)}
-#' which gives the probability of the binary outcome of a case (usually, survival or death) being known by
-#' time \eqn{t}. The delay distribution is parameterised with disease-specific parameters before it is
-#' supplied here.
+#' which gives the probability of the binary outcome of a case (survival or
+#' death) being known by time \eqn{t}. The delay distribution is parameterised
+#' with disease-specific parameters before it is supplied here.
 #'
 #' **Note** that the function arguments `burn_in` and `smoothing_window` are not
 #' explicitly used in this calculation. `burn_in` controls how many estimates at