Cleanup

core/block.js

@@ -32,7 +32,6 @@ goog.require('Blockly.utils.string');
 goog.require('Blockly.Workspace');
 
 goog.requireType('Blockly.IASTNodeLocation');
-goog.requireType('Blockly.connectionTypeChecker');
 
 
 /**

core/connection.js

@@ -494,6 +494,7 @@ Blockly.Connection.prototype.targetBlock = function() {
  * @return {boolean} True if the connections share a type.
  */
 Blockly.Connection.prototype.checkType = function(otherConnection) {
+  // TODO (fenichel): Add deprecation warnings.
   return this.getConnectionTypeChecker().canConnect(this, otherConnection,
       false);
 };

core/connection_checks.js

@@ -1,3 +1,14 @@
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @fileoverview An object that encapsulates logic for checking whether a potential
+ * connection is safe and valid.
+ * @author fenichel@google.com (Rachel Fenichel)
+ */
 'use strict';
 
 goog.provide('Blockly.ConnectionTypeChecker');

core/connection_db.js

@@ -16,8 +16,6 @@ goog.provide('Blockly.ConnectionDB');
 
 goog.require('Blockly.RenderedConnection');
 
-goog.requireType('Blockly.ConnectionTypeChecker');
-
 
 /**
  * Database of connections.