Remove remaining sbt launcher stuff

csbt.README

@@ -1,7 +0,0 @@
-`csbt` is a coursier-based sbt launcher.
-
-It is extremely experimental, suffering a few issues. In particular, compiling
-several modules at once (e.g. by running `csbt test:compile` from the coursier
-sources) often results in spurious scalac errors. Also, it might have issues
-with `*.sbt` files under `~/.sbt` - the whole point of csbt would be to scrap
-those for standard configuration files.

project/Release.scala

@@ -136,8 +136,7 @@ object Release {
     val baseDir = Project.extract(state).get(baseDirectory.in(ThisBuild))
     val scriptsDir = baseDir / "scripts"
     val scriptFiles = Seq(
-      (scriptsDir / "generate-launcher.sh") -> (baseDir / "coursier"),
-      (scriptsDir / "generate-sbt-launcher.sh") -> (baseDir / "csbt")
+      (scriptsDir / "generate-launcher.sh") -> (baseDir / "coursier")
     )
 
     val vcs = state.vcs

scripts/generate-sbt-launcher.sh

@@ -1,14 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-VERSION=1.0.0
-
-"$(dirname "$0")/../coursier" bootstrap \
-  "io.get-coursier:sbt-launcher_2.11:$VERSION" \
-  -r sonatype:releases \
-  --no-default \
-  -i launcher \
-  -I launcher:org.scala-sbt:launcher-interface:1.0.0 \
-  -o csbt \
-  -J -Djline.shutdownhook=false \
-  "$@"