private void externalEntryPointRemoved(Address addr) {
		program.setChanged(ProgramEvent.EXTERNAL_ENTRY_REMOVED, addr, addr, null, null);
	}
Removes the external entry point at the given address
@param addr that address at which to remove the external entry point attribute.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/references/ReferenceDBManager.java