[GR-7660][GR-10130] Drop rails 4.2 ecosystem tests and the jtt tool

PullRequest: truffleruby/666

Author: pitr-ch

doc/contributor/quick-rails-testing.md

@@ -12,7 +12,6 @@
 
   it "has no common constants with Object" do
     known_offenders = [
-      :Gem, # Truffle::Gem::BCrypt, to remove with truffleruby-tool
       :Binding, # Truffle::Binding.of_caller, should move under TruffleRuby
     ]
     code = "puts((Truffle.constants & Object.constants) - #{known_offenders.inspect})"

spec/truffle/truffle/constants_spec.rb

@@ -132,8 +132,6 @@
 import org.truffleruby.extra.TruffleRubyNodesFactory;
 import org.truffleruby.extra.ffi.PointerNodesBuiltins;
 import org.truffleruby.extra.ffi.PointerNodesFactory;
-import org.truffleruby.gem.bcrypt.BCryptNodesBuiltins;
-import org.truffleruby.gem.bcrypt.BCryptNodesFactory;
 import org.truffleruby.interop.InteropNodesBuiltins;
 import org.truffleruby.interop.InteropNodesFactory;
 import org.truffleruby.interop.PolyglotNodesBuiltins;
@@ -167,7 +165,6 @@ public static void setupBuiltinsLazy(CoreMethodNodeManager coreManager, Primitiv
         ArrayNodesBuiltins.setup(coreManager, primitiveManager);
         AtomicReferenceNodesBuiltins.setup(coreManager, primitiveManager);
         BasicObjectNodesBuiltins.setup(coreManager, primitiveManager);
-        BCryptNodesBuiltins.setup(coreManager, primitiveManager);
         BigDecimalNodesBuiltins.setup(coreManager, primitiveManager);
         BindingNodesBuiltins.setup(coreManager, primitiveManager);
         ByteArrayNodesBuiltins.setup(coreManager, primitiveManager);
@@ -243,7 +240,6 @@ public static List<List<? extends NodeFactory<? extends RubyNode>>> getCoreNodeF
             ArrayNodesFactory.getFactories(),
             AtomicReferenceNodesFactory.getFactories(),
             BasicObjectNodesFactory.getFactories(),
-            BCryptNodesFactory.getFactories(),
             BigDecimalNodesFactory.getFactories(),
             BindingNodesFactory.getFactories(),
             ByteArrayNodesFactory.getFactories(),

src/main/java/org/truffleruby/builtins/BuiltinsClasses.java

@@ -544,9 +544,6 @@ public CoreLibrary(RubyContext context) {
         bigDecimalClass = defineClass(numericClass, "BigDecimal");
         Layouts.CLASS.setInstanceFactoryUnsafe(bigDecimalClass, Layouts.BIG_DECIMAL.createBigDecimalShape(bigDecimalClass, bigDecimalClass));
 
-        final DynamicObject gem = defineModule(truffleModule, "Gem");
-        defineModule(gem, "BCrypt");
-
         truffleFFIModule = defineModule(truffleModule, "FFI");
         truffleFFIPointerClass = defineClass(truffleFFIModule, objectClass, "Pointer");
         Layouts.CLASS.setInstanceFactoryUnsafe(truffleFFIPointerClass, Layouts.POINTER.createPointerShape(truffleFFIPointerClass, truffleFFIPointerClass));