[nomerge] SI-8899 Revert "SI-8627 make Stream.filterNot non-eager"

This reverts commit 9276a1205f74fdec74206209712831913e93f359.

The change is not binary compatible, See discussion on SI-8899. Making
filterImpl non-private changes its call-sites (within TraversableLike)
from INVOKESTATIC to INVOKEINTERFACE. Subclasses of TraversableLike
compiled before this change don't have a mixin for filterImpl.

2 files changed, 1 insertions, 19 deletions

diff --git a/test/files/run/t4332.scala b/test/files/run/t4332.scala
index 1c7e7d73de..5a67922911 100644
--- a/test/files/run/t4332.scala
+++ b/test/files/run/t4332.scala
@@ -12,7 +12,7 @@ object Test extends DirectTest {
   }
 
   def isExempt(sym: Symbol) = {
-    val exempt = Set("view", "repr", "sliceWithKnownDelta", "sliceWithKnownBound", "transform", "filterImpl")
+    val exempt = Set("view", "repr", "sliceWithKnownDelta", "sliceWithKnownBound", "transform")
     (exempt contains sym.name.decoded)
   }
 
diff --git a/test/junit/scala/collection/immutable/StreamTest.scala b/test/junit/scala/collection/immutable/StreamTest.scala
deleted file mode 100644
index 6dc1c79a48..0000000000
--- a/test/junit/scala/collection/immutable/StreamTest.scala
+++ /dev/null
@@ -1,18 +0,0 @@
-package scala.collection.immutable
-
-import org.junit.runner.RunWith
-import org.junit.runners.JUnit4
-import org.junit.Test
-import org.junit.Assert._
-
-@RunWith(classOf[JUnit4])
-class StreamTest {
-
-  @Test
-  def t6727_and_t6440(): Unit = {
-    assertTrue(Stream.continually(()).filter(_ => true).take(2) == Seq((), ()))
-    assertTrue(Stream.continually(()).filterNot(_ => false).take(2) == Seq((), ()))
-    assertTrue(Stream(1,2,3,4,5).filter(_ < 4) == Seq(1,2,3))
-    assertTrue(Stream(1,2,3,4,5).filterNot(_ > 4) == Seq(1,2,3,4))
-  }
-}