cleanup Windows CI trigger

[quentin]

Removes the trigger on every push of every branches, was only necessary during dev.

[codecov]

Codecov Report

Merging #2210 (9d61826) into master (fcd024b) will increase coverage by 0.00%.
The diff coverage is 75.98%.

@@           Coverage Diff           @@
##           master    #2210   +/-   ##
=======================================
  Coverage   75.51%   75.51%           
=======================================
  Files         452      452           
  Lines       27394    27479   +85     
=======================================
+ Hits        20687    20752   +65     
- Misses       6707     6727   +20     

Impacted Files	Coverage Δ
src/ast/ExecutionOrder.h	100.00% <ø> (ø)
src/ast/Program.h	100.00% <ø> (ø)
src/ast/transform/ComponentInstantiation.cpp	91.98% <ø> (ø)
src/ast/transform/MinimiseProgram.h	100.00% <ø> (ø)
src/ast/transform/ResolveAliases.cpp	98.93% <ø> (ø)
src/ast/utility/SipsMetric.h	18.18% <ø> (ø)
src/ast/utility/Utils.h	100.00% <ø> (ø)
src/ast/utility/Visitor.h	57.33% <0.00%> (ø)
src/ast2ram/provenance/ClauseTranslator.h	100.00% <ø> (ø)
src/ast2ram/provenance/UnitTranslator.h	100.00% <ø> (ø)
... and 96 more

[b-scholz]

Thanks!