sccache will start itself

Author: Dave Abrahams

docs/DevelopmentTips.md

@@ -36,7 +36,7 @@ $ sccache --start-server
 $ ./swift/utils/build-script MY_ARGS --sccache
 ```
 
-If you want to always use sccache, you can `export SWIFT_USE_SCCACHE=1` and omit the `--sccache` flag from the `build-script` invocation (you'll still need to start the server).
+If you want to always use sccache, you can `export SWIFT_USE_SCCACHE=1` and omit the `--sccache` flag from the `build-script` invocation.
 
 Given the size of artifacts generated, you might also want to bump the cache size from the default 10GB to something larger, say by putting `export SCCACHE_CACHE_SIZE="50G"` in your dotfile(s).