update readme for new vignette building workflow

README.md

@@ -9,26 +9,7 @@ Using the `remotes` package, this is easily installed via:
 ```r
 remotes::install_url("https://git.flavigny.de/christian/hateimparlament/archive/master.zip")
 ```
-Since the fetching and reading is very slow and depends on an internet connection, all vignettes
-use `read_from_csv` to read already parsed tibbles from `.csv` files.
-
-That's why, if you want to build the vignettes yourself, you need to
-download the source code, e.g. on Linux
-```
-git clone https://git.flavigny.de/christian/hateimparlament
-cd hateimparlament
-```
-then start `R` and do
-```r
-devtools::load_all()
-fetch_all(create = TRUE)
-read_all() %>% repair() -> res
-write_to_csv(res, create = TRUE)
-```
-Then finally, do:
-```r
-devtools::install(build_vignettes = TRUE)
-```
+If you want to build the vignettes, pass `build_vignettes = TRUE`.
 
 # Features