Revert "[Truffle] - Adds Random class"

This reverts commit 245279f.

We're going to use the Rubinius implementation, so no need for all of this boilerplate code.

Author: nirvdrum

spec/truffle/tags/core/random/new_tags.txt

@@ -1,3 +1,4 @@
+fails:Random.new returns a new instance of Random
 fails:Random.new uses a random seed value if none is supplied
 fails:Random.new returns Random instances initialized with different seeds
 fails:Random.new accepts an Integer seed value as an argument

truffle/src/main/java/org/jruby/truffle/nodes/RubyTypes.java

@@ -53,8 +53,7 @@
                 RubyEncoding.class, //
                 RubySymbol.class, //
                 RubyThread.class, //
-                RubyTime.class,
-                RubyRandom.class, //
+                RubyTime.class, //
                 RubyEncodingConverter.class, //
                 RubyMethod.class, //
                 RubyUnboundMethod.class, //

truffle/src/main/java/org/jruby/truffle/nodes/core/RandomNodes.java

@@ -98,7 +98,6 @@ public class CoreLibrary {
     private final RubyClass securityErrorClass;
     private final RubyClass standardErrorClass;
     private final RubyClass stringClass;
-    private final RubyClass randomClass;
     private final RubyClass stringDataClass;
     private final RubyClass symbolClass;
     private final RubyClass syntaxErrorClass;
@@ -285,7 +284,6 @@ public CoreLibrary(RubyContext context) {
         rangeClass = defineClass("Range", new RubyRange.RangeAllocator());
         regexpClass = defineClass("Regexp", new RubyRegexp.RegexpAllocator());
         stringClass = defineClass("String", new RubyString.StringAllocator());
-        randomClass = defineClass("Random");
         symbolClass = defineClass("Symbol");
         threadClass = defineClass("Thread", new RubyThread.ThreadAllocator());
         timeClass = defineClass("Time", new RubyTime.TimeAllocator());