Reduce its testing and perfing to just the fast Linux bots, and remove it from the default set of dm/nanobench configs. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2344553002 Review-Url: https://codereview.chromium.org/2344553002
Currently only turned on for one bot. May turn it on for more after more conversations. BUG=skia:5628 GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2231943002 Review-Url: https://codereview.chromium.org/2231943002
Remove a bunch of "pragma: no cover" by removing unused code or adding test bots to cover. BUG=skia:5578 GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2215443003 Review-Url: https://codereview.chromium.org/2215443003