Blocks/control.js -- remove default flyout branch. Should be determined by xml mutation

Author: SharkPool-SP

blocks_vertical/control.js

@@ -237,8 +237,7 @@ Blockly.Blocks['control_expandableIf'] = {
       "extensions": ["colours_control", "shape_statement"]
     });
 
-    this.branches_ = 1;
-    if (this.isInFlyout) this.addCase(true);
+    this.branches_ = 0;
     this.nextIsElse = true;
     this.endsInElse = false;
   },