I have a site which we have been developing using test data. The test data is really just old data, and is ok to have remain on the site, but we would prefer to remove it and start with current fresh data.

The question we have is...is this going to cause massive issues with how Google views us, when we remove these pages, noting that there are around 20,000 pages we intend to remove, but only 200 have been indexed in Google, although through our Webmaster Tools, indexing seems to be more extensive than that indicating that far more than 200 have been indexed.

Thanks in advance.