void deleteNode(BTreeNode node) throws IOException {
		int bufferId = node.getBufferId();
		nodeTable.remove(bufferId);
		bufferMgr.releaseBuffer(node.getBuffer());
		bufferMgr.deleteBuffer(bufferId);
	}
Delete a node.
@param node node to be deleted.
@throws IOException thrown if an IO error occurs
Ghidra/Framework/DB/src/main/java/db/NodeMgr.java