Remove unneeded test

This isn't testing anything useful after the refactoring that removed
the implicit FileTree.Repository.

sbt/src/sbt-test/nio/inputs/build.sbt

@@ -1,43 +0,0 @@
-import java.nio.file.Path
-
-import sbt.Keys._
-import sbt.nio.file._
-import sbt.nio.Keys._
-
-val allInputs = taskKey[Seq[File]]("")
-val allInputsExplicit = taskKey[Seq[File]]("")
-
-val checkInputs = inputKey[Unit]("")
-val checkInputsExplicit = inputKey[Unit]("")
-
-allInputs := (Compile / unmanagedSources / allFiles).value.map(_.toFile)
-
-checkInputs := {
-  val res = allInputs.value
-  val scala = (Compile / scalaSource).value
-  val expected = Def.spaceDelimited("<args>").parsed.map(scala / _).toSet
-  assert(res.toSet == expected)
-}
-
-// In this test we override the FileTree.Repository used by the all method.
-allInputsExplicit := {
-  val files = scala.collection.mutable.Set.empty[File]
-  val underlying = fileTreeView.value
-  val view: FileTreeView[(Path, FileAttributes)] = new FileTreeView[(Path, FileAttributes)] {
-    override def list(path: Path): Seq[(Path, FileAttributes)] = {
-      val res = underlying.list(path)
-      files ++= res.map(_._1.toFile)
-      res
-    }
-  }
-  val include = (Compile / unmanagedSources / includeFilter).value
-  view.list((Compile / unmanagedSources / fileInputs).value)
-  files.filter(include.accept).toSeq
-}
-
-checkInputsExplicit := {
-  val res = allInputsExplicit.value
-  val scala = (Compile / scalaSource).value
-  val expected = Def.spaceDelimited("<args>").parsed.map(scala / _).toSet
-  assert(res.toSet == expected)
-}

sbt/src/sbt-test/nio/inputs/src/main/scala/bar/Bar.scala

@@ -1,3 +0,0 @@
-package bar
-
-object Bar

sbt/src/sbt-test/nio/inputs/src/main/scala/foo/Foo.scala

@@ -1,3 +0,0 @@
-package foo
-
-object Foo

sbt/src/sbt-test/nio/inputs/test

@@ -1,3 +0,0 @@
-> checkInputs foo/Foo.scala bar/Bar.scala
-
-> checkInputsExplicit foo/Foo.scala bar/Bar.scala