private void attemptOverlaySpaceRemoval(OverlayAddressSpace addressSpace) {
		lock.acquire();
		try {
			program.removeOverlaySpace(addressSpace.getName());
		}
		catch (LockException | NotFoundException e) {
			throw new AssertException();
		}
		finally {
			lock.release();
		}

	}
Attempts to remove the given overlay address space.  Removal will only succeed if no
memory blocks currently reside within the space.

@param addressSpace overlay address space to be removed
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/mem/MemoryMapDB.java