Remove old syntax

[M-Adoo]

No description provided.

[codecov]

Codecov Report

Patch coverage: 96.78% and project coverage change: +1.20% 🎉

Comparison is base (a7db796) 83.24% compared to head (562bed3) 84.44%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #422      +/-   ##
==========================================
+ Coverage   83.24%   84.44%   +1.20%     
==========================================
  Files         185      177       -8     
  Lines       24786    22241    -2545     
==========================================
- Hits        20632    18782    -1850     
+ Misses       4154     3459     -695     

Files Changed	Coverage Δ
core/src/animation/transition.rs	94.02% <ø> (ø)
core/src/declare.rs	60.86% <ø> (-22.06%)	⬇️
core/src/events/pointers.rs	69.26% <ø> (+2.73%)	⬆️
core/src/lib.rs	100.00% <ø> (ø)
core/src/widget_children/compose_child_impl.rs	67.74% <0.00%> (-4.84%)	⬇️
dev-helper/src/widget_test.rs	100.00% <ø> (ø)
macros/src/child_template.rs	92.66% <ø> (-0.20%)	⬇️
macros/src/lib.rs	85.71% <ø> (-1.03%)	⬇️
macros/src/symbol_process.rs	85.34% <ø> (-1.66%)	⬇️
macros/src/variable_names.rs	85.71% <ø> (ø)
... and 75 more

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