Remove dead-code runtime hash() methods.

ScalaRunTime had a bunch of overloads of the `hash()` method,
but only the `Any` version is ever used by the codegen. Worse,
their implementation was not in sync with the actual
implementations in BoxesRunTime, called by the `Any` version.
For example,
  hash(0x80000000L) != hash(0x80000000L: Any)

This commit simply removes all of this dead code.
Similarly, we remove BoxesRunTime.hashFromObject(), which was
never called either.

1 files changed, 3 insertions, 2 deletions

diff --git a/test/files/run/hashCodeBoxesRunTime.scala b/test/files/run/hashCodeBoxesRunTime.scala
index ba1a30f5fb..8ad94c252a 100644
--- a/test/files/run/hashCodeBoxesRunTime.scala
+++ b/test/files/run/hashCodeBoxesRunTime.scala
@@ -3,7 +3,8 @@
 object Test
 {
   import java.{ lang => jl }
-  import scala.runtime.BoxesRunTime.{ hashFromNumber, hashFromObject }
+  import scala.runtime.BoxesRunTime.hashFromNumber
+  import scala.runtime.ScalaRunTime.{ hash => hashFromAny }
 
   def allSame[T](xs: List[T]) = assert(xs.distinct.size == 1, "failed: " + xs)
 
@@ -17,7 +18,7 @@ object Test
       val hashes = mkNumbers(n) map hashFromNumber
       allSame(hashes)
       if (n >= 0) {
-        val charCode = hashFromObject(n.toChar: Character)
+        val charCode = hashFromAny(n.toChar: Character)
         assert(charCode == hashes.head)
       }
     }