Remove officer/flextable outputs from prebuilt vignette objects

[john-harrold]

Specifically the Reporting vignette.
`
checking re-building of vignette outputs ... [36s/43s] ERROR
Error(s) in re-building vignettes:
...
--- re-building ‘Deployment.Rmd’ using rmarkdown
--- finished re-building ‘Deployment.Rmd’

--- re-building ‘Estimation.Rmd’ using rmarkdown
--- finished re-building ‘Estimation.Rmd’

--- re-building ‘Language.Rmd’ using rmarkdown
--- finished re-building ‘Language.Rmd’

--- re-building ‘NCA.Rmd’ using rmarkdown

Quitting from lines 358-359 [unnamed-chunk-26] (NCA.Rmd)
Error: processing vignette 'NCA.Rmd' failed with diagnostics:
argument must be coercible to non-negative integer
--- failed re-building ‘NCA.Rmd’

--- re-building ‘Reporting.Rmd’ using rmarkdown

Quitting from lines 523-524 [unnamed-chunk-39] (Reporting.Rmd)
Error: processing vignette 'Reporting.Rmd' failed with diagnostics:
argument must be coercible to non-negative integer
--- failed re-building ‘Reporting.Rmd’

--- re-building ‘Simulation.Rmd’ using rmarkdown
--- finished re-building ‘Simulation.Rmd’

--- re-building ‘Titration.Rmd’ using rmarkdown
--- finished re-building ‘Titration.Rmd’

SUMMARY: processing the following files failed:
‘NCA.Rmd’ ‘Reporting.Rmd’

Error: Vignette re-building failed.
Execution halted
`