void externalEntryPointRemoved(Address addr) {
		program.setChanged(ProgramEvent.EXTERNAL_ENTRY_REMOVED, addr, addr, null, null);
	}
Called by the NamespaceManager when a namespace is removed; remove all symbols that have the
given namespace ID.

@param namespaceID ID of namespace being removed
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/symbol/SymbolManager.java