Remove 3 semi-redundant try-jobs (#10786)
Remove 3 semi-redundant try-jobs (#10786)

This is a subset of https://github.com/flutter/engine/pull/10485.
Hopefully this doesn't significantly reduce our coverage since we
have now limited the fuchsia auto-roller frequency.
jason-simmons/flutter_engine,devoncarew/engine,mikejurka/engine,jamesr/flutter_engine,cdotstout/sky_engine,aam/engine,mikejurka/engine,jason-simmons/sky_engine,tvolkert/engine,Hixie/sky_engine,mikejurka/engine,jamesr/sky_engine,Hixie/sky_engine,jason-simmons/flutter_engine,devoncarew/sky_engine,chinmaygarde/sky_engine,chinmaygarde/sky_engine,jason-simmons/flutter_engine,Hixie/sky_engine,aam/engine,Hixie/sky_engine,aam/engine,devoncarew/engine,rmacnak-google/engine,jason-simmons/flutter_engine,devoncarew/sky_engine,cdotstout/sky_engine,chinmaygarde/sky_engine,aam/engine,flutter/engine,devoncarew/engine,mikejurka/engine,aam/engine,jason-simmons/sky_engine,chinmaygarde/flutter_engine,jamesr/flutter_engine,chinmaygarde/sky_engine,devoncarew/engine,cdotstout/sky_engine,devoncarew/sky_engine,tvolkert/engine,chinmaygarde/flutter_engine,rmacnak-google/engine,Hixie/sky_engine,jason-simmons/sky_engine,tvolkert/engine,flutter/engine,cdotstout/sky_engine,aam/engine,chinmaygarde/flutter_engine,jason-simmons/flutter_engine,mikejurka/engine,jamesr/flutter_engine,chinmaygarde/flutter_engine,cdotstout/sky_engine,jamesr/flutter_engine,flutter/engine,cdotstout/sky_engine,jamesr/flutter_engine,rmacnak-google/engine,devoncarew/sky_engine,jason-simmons/sky_engine,jamesr/flutter_engine,tvolkert/engine,chinmaygarde/sky_engine,jason-simmons/flutter_engine,rmacnak-google/engine,rmacnak-google/engine,Hixie/sky_engine,devoncarew/sky_engine,jamesr/sky_engine,rmacnak-google/engine,jamesr/flutter_engine,jason-simmons/flutter_engine,jamesr/flutter_engine,jamesr/sky_engine,devoncarew/engine,devoncarew/sky_engine,tvolkert/engine,chinmaygarde/sky_engine,jamesr/sky_engine,flutter/engine,chinmaygarde/flutter_engine,cdotstout/sky_engine,jamesr/flutter_engine,jamesr/sky_engine,jamesr/sky_engine,devoncarew/sky_engine,flutter/engine,Hixie/sky_engine,devoncarew/engine,tvolkert/engine,devoncarew/engine,chinmaygarde/flutter_engine,aam/engine,chinmaygarde/flutter_engine,aam/engine,jason-simmons/flutter_engine,Hixie/sky_engine,mikejurka/engine,mikejurka/engine,rmacnak-google/engine,jamesr/sky_engine,mikejurka/engine,flutter/engine,jason-simmons/sky_engine,jason-simmons/sky_engine,chinmaygarde/sky_engine,mikejurka/engine,flutter/engine,tvolkert/engine,jason-simmons/sky_engine,flutter/engine