devel/electron19: Remove expired port

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devel/Makefile

devel/electron19/Makefile

devel/electron19/Makefile.version

devel/electron19/distinfo

devel/electron19/files/apply-electron-patches.sh

devel/electron19/files/package.json

devel/electron19/files/patch-BUILD.gn

...n19/files/patch-apps_ui_views_app__window__frame__view.cc

...n19/files/patch-ash_display_mirror__window__controller.cc

devel/electron19/files/patch-base_BUILD.gn

...ator_partition__allocator_address__space__randomization.h

...tch-base_allocator_partition__allocator_page__allocator.h

...locator_partition__allocator_page__allocator__constants.h

..._partition__allocator_page__allocator__internals__posix.h

...locator_partition__allocator_partition__address__space.cc

...h-base_allocator_partition__allocator_partition__alloc.cc

...allocator_partition__allocator_partition__alloc__config.h

...ocator_partition__allocator_partition__alloc__constants.h

...tch-base_allocator_partition__allocator_partition__page.h