add func TimeoutRemove for remove time out

[liao725636367]

add func TimeoutRemove for remove time out

[codecov-io]

Codecov Report

Merging #406 into master will decrease coverage by 0.04%. The diff coverage is n/a.

@@            Coverage Diff            @@
##           master    #406      +/-   ##
=========================================
- Coverage    4.97%   4.92%   -0.05%     
=========================================
  Files           1       1              
  Lines        4485    4485              
=========================================
- Hits          223     221       -2     
- Misses       4253    4254       +1     
- Partials        9      10       +1

Impacted Files	Coverage Δ
gtk/gtk.go	4.92% <0%> (-0.05%)	:arrow_down:

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[mattn]

Should call g_source_remove?