only delete applicable transition animations

[Rich-Harris]

fixes #1290

[codecov-io]

Codecov Report

Merging #1293 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1293   +/-   ##
=======================================
  Coverage   91.65%   91.65%           
=======================================
  Files         122      122           
  Lines        4328     4328           
  Branches     1364     1364           
=======================================
  Hits         3967     3967           
  Misses        148      148           
  Partials      213      213

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 78f506a...6860d09. Read the comment docs.