Update README.md

Author: zdebruine

README.md

@@ -17,7 +17,6 @@ Install from [CRAN](https://cran.r-project.org/web/packages/RcppML/index.html) o
 
 ```
 install.packages('RcppML')                       # install CRAN version
-devtools::install_github("zdebruine/RcppSparse") # dev version dependency
 devtools::install_github("zdebruine/RcppML")     # compile dev version
 ```