Not too sure this method makes a lot of sense since the bindings are part of the VDB itself, but...

When it's executed from AdminShell, the following is spewed forth:

Identifier supplied can not be null and must adhere to the naming patterns; Please check the java docs for the proper naming patterns.
// Error: // Uncaught Exception: Typed variable declaration : at Line: 1020 : in file: URL: jar:file:/home/pnittel/teiid62RC1/adminshell/lib/teiid-adminshell-6.2.0-SNAPSHOT.jar!/scripts/adminapi.bsh : connectorBindings .iterator ( )

Target exception: java.lang.NullPointerException: Null Pointer in Method Invocation

In this case, I'd given this command:
deleteVDBAndConnectorBindings("NiapThing", "1");

Good news is the VDB /is/ deleted when this is executed.