Remove print statement from test that resulted in a non-deterministic output stream.

Fixes [SR-13754], rdar://problem/70531607

Author: adrian-prantl

lldb/test/Shell/SwiftREPL/Inputs/A.swift

@@ -1,6 +1,5 @@
 public class Foo {
   public static func foo() -> String  {
-    print("A")
     return "A"
   }
 }