@Override
	public void deleteMatchTag(VTMatchTag tag) {
		String tagName = tag.getName();
		try {
			lock.acquire();
			VTMatchTagDB tagDB = getMatchTagDB(tagName);
			if (tagDB == null) {
				return; // not sure if this can happen
			}

			long key = tagDB.getKey();
			tagCache.delete(key);
			matchTagAdapter.deleteRecord(key);

		}
		catch (IOException e) {
			dbError(e);
		}
		finally {
			lock.release();
		}
		setObjectChanged(VTEvent.TAG_REMOVED, this, tagName, null);
	}
Mark the state of a Version Tracking item as having changed and generate
the event of the specified type.  Any or all parameters may be null.
@param eventType event type
@param affected the version tracking object that was affected by the change.
@param oldValue original value or an Object that is related to the event.
@param newValue new value or an Object that is related to the event.
Ghidra/Features/VersionTracking/src/main/java/ghidra/feature/vt/api/db/VTSessionDB.java