Remove trait-private-var test from sbt/sbt

sbt/src/sbt-test/source-dependencies/trait-private-var/A.scala

@@ -1,3 +0,0 @@
-trait A {
-	def bar: Int = 0
-}

sbt/src/sbt-test/source-dependencies/trait-private-var/B.scala

@@ -1,3 +0,0 @@
-object B extends A {
-	def main(args: Array[String]): Unit = println(bar)
-}

sbt/src/sbt-test/source-dependencies/trait-private-var/changes/A.scala

@@ -1,5 +0,0 @@
-trait A {
-	private var foo = 12
-	// we need to access foo to trigger AbstractMethodError
-	def bar: Int = foo
-}

sbt/src/sbt-test/source-dependencies/trait-private-var/test

@@ -1,14 +0,0 @@
-# compile and run for the first time to verify that everything works
-> run
-
-# introduce private var and refer to it in a trait that we inherit from
-# there'll be pair of getters and setters generated for private var that
-# has to be implemented by a class (where you can declare corresponding field)
-$ copy-file changes/A.scala A.scala
-
-# this fails with AbstractMethodError because getters and setters for
-# a private var are not generated because introduction of a private var
-# does not trigger recompilation of B
-# B is not recompiled because incremental compiler tracks only public
-# interace (members visible from outside of given trait/class)
-> run