Remove PrimitiveFailure

Author: pitr-ch

src/main/java/org/truffleruby/core/CoreLibrary.java

@@ -1495,7 +1495,6 @@ public DynamicObject getStructClass() {
             "/core/gc.rb",
             "/core/nil.rb",
             "/core/truffle/platform.rb",
-            "/core/support.rb",
             "/core/string.rb",
             "/core/random.rb",
             "/core/truffle/kernel_operations.rb",

src/main/ruby/truffleruby/core/exception.rb

@@ -150,9 +150,6 @@ def location
   end
 end
 
-class PrimitiveFailure < Exception
-end
-
 class ScriptError < Exception
 end
 

src/main/ruby/truffleruby/core/module.rb

@@ -106,24 +106,20 @@ def const_get(name, inherit = true)
       return value
     end
 
-    if name.kind_of?(String)
-      names = name.split('::')
-      unless names.empty?
-        names.shift if '' == names.first
-      end
-      raise NameError, "wrong constant name #{name}" if names.empty? || names.include?('')
-      res = self
-      names.each do |s|
-        if res.kind_of?(Module)
-          res = res.const_get(s, inherit)
-        else
-          raise TypeError, "#{name} does not refer to a class/module"
-        end
+    names = name.split('::') # name is always String
+    unless names.empty?
+      names.shift if '' == names.first
+    end
+    raise NameError, "wrong constant name #{name}" if names.empty? || names.include?('')
+    res = self
+    names.each do |s|
+      if res.kind_of?(Module)
+        res = res.const_get(s, inherit)
+      else
+        raise TypeError, "#{name} does not refer to a class/module"
       end
-      res
-    else
-      raise PrimitiveFailure
     end
+    res
   end
 
   def self.constants(inherited = undefined)