Remove install_github call from vignette setup

Author: istallworthy

vignettes/Workflow_Continuous_Exposure.qmd

@@ -33,13 +33,13 @@ Until *devMSMs* is available on CRAN, you will need to install it directly from
 ```{r setup}
 options(repos = c(CRAN = "https://cloud.r-project.org"))
 
-install.packages("devtools", quiet = TRUE)
-require("devtools", quietly = TRUE)
+# install.packages("devtools", quiet = TRUE)
+# require("devtools", quietly = TRUE)
 
 # devtools::install_github("istallworthy/devMSMs", quiet = TRUE)
 library(devMSMs)
 
-devtools::install_github("istallworthy/devMSMsHelpers", quiet = TRUE)
+# devtools::install_github("istallworthy/devMSMsHelpers", quiet = TRUE)
 library(devMSMsHelpers)
 ```