srt: Remove msg-size property

Remove the now unused property
17 jobs for 1005-srt-no-msg-size in 37 minutes and 24 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Preparation
passed #407242
gst indent

00:00:36

passed #407241
manifest

00:00:43

 
  Build
passed #407248
build cerbero android universal

00:12:44

passed #407249
build cerbero cross win32

00:11:06

passed #407250
build cerbero cross win64

00:09:08

passed #407247
build cerbero fedora x86_64

00:08:58

manual #407252
gst-ios-12.2 allowed to fail manual
build cerbero ios universal
passed #407251
gst-macos-10.14
build cerbero macos x86_64

00:06:57

passed #407243
build fedora x86_64

00:07:53

passed #407244
build nodebug fedora x86_64

00:05:26

passed #407245
build static fedora x86_64

00:15:12

passed #407246
build static nodebug fedora x86_64

00:13:00

 
  Test
passed #407253
check fedora

00:04:04

passed #407254
integration testsuites fedora

00:13:25

passed #407255
valgrind bad

00:07:41

 
  Integrate
passed #407256
android universal examples

00:06:59

passed #407257
documentation

00:05:45