What is the regular season 1 result of the season when the Copa México was no longer played, the pyramid level was 2, and the regular season 2 result was 15th?
CREATE TABLE "year_by_year" (
  "season" text,
  "pyramid_level" text,
  "regular_season_1" text,
  "playoffs_1" text,
  "regular_season_2" text,
  "playoffs_2" text,
  "copa_m_xico" text,
  "concacaf" text
);
SELECT "regular_season_1" FROM "year_by_year" WHERE "copa_m_xico"='no longer played' AND "pyramid_level"='2' AND "regular_season_2"='15th';