Update getCurrentContext()/getCurrentLanguage() to use the new references

Author: eregon

src/main/java/org/truffleruby/RubyContext.java

@@ -542,7 +542,7 @@ public Hashing getHashing() {
 
     public RubyLanguage getLanguageSlow() {
         CompilerAsserts.neverPartOfCompilation(
-                "Use getLanguage() or @CachedLanguage instead, so the RubyLanguage instance is constant in PE code");
+                "Use getLanguage() or RubyLanguage.get(Node) instead, so the RubyLanguage instance is constant in PE code");
         return language;
     }
 

src/main/java/org/truffleruby/RubyLanguage.java

@@ -463,13 +463,13 @@ protected void disposeContext(RubyContext context) {
     }
 
     public static RubyContext getCurrentContext() {
-        CompilerAsserts.neverPartOfCompilation("Use getContext() or @CachedContext instead in PE code");
-        return getCurrentContext(RubyLanguage.class);
+        CompilerAsserts.neverPartOfCompilation("Use getContext() or RubyContext.get(Node) instead in PE code");
+        return RubyContext.get(null);
     }
 
     public static RubyLanguage getCurrentLanguage() {
-        CompilerAsserts.neverPartOfCompilation("Use getLanguage() or @CachedLanguage instead in PE code");
-        return getCurrentLanguage(RubyLanguage.class);
+        CompilerAsserts.neverPartOfCompilation("Use getLanguage() or RubyLanguage.get(Node) instead in PE code");
+        return RubyLanguage.get(null);
     }
 
     @Override