Nuke Walther?

BUR #26248 is pending approval.

remove implication walther_p38 -> walther
remove implication walther_p5 -> walther
remove implication walther_p99 -> walther
remove implication walther_ppk -> walther
remove implication walther_wa_2000 -> walther
deprecate walther
nuke walther

Potentially controversial. I consider this should be rendered not useful anymore and ambiguous on first sight (similar to other deprecated single surname-type of tags). For specific gun models by Walther, it can be done by simply searching for walther_* instead.

For similar reason all FN weapon names does not automatically imply FN Herstal. Walther MP doesn't even imply. The same goes with all of Heckler & Koch products.

In case the Walther company name or logo is mentioned on a post, I propose Walther_Arms to be used instead.

Going to be honest, as someone who knows nothing of guns there have been times when the broader gun brand/series/whatever name has been in the picture and I have been grateful to have something more specific to tag even if I don't know the exact model name. I'd rather keep these personally.