[WPE] Remove unnecessary introspection annotations

[TingPing]

7154d37

[WPE] Remove unnecessary introspection annotations
https://bugs.webkit.org/show_bug.cgi?id=291354

Reviewed by Michael Catanzaro.

This used the copy-func and free-func annotations which was
added in gobject-introspection 1.74 (1 year newer than our
glib dep 2.70).

However this struct is a GBoxed type so introspection already
knows this information and it can be removed.

* Source/WebKit/WPEPlatform/wpe/WPEBufferDMABufFormats.cpp:

Canonical link: https://commits.webkit.org/293523@main

573a08c

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	🛠 win
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	🧪 wpe-wk2	🧪 win-tests
✅ 🧪 webkitperl	🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe
	✅ 🧪 ios-wk2-wpt		✅ 🛠 wpe-cairo
	✅ 🧪 api-ios	🧪 mac-wk2	✅ 🛠 gtk
	✅ 🛠 vision	🧪 mac-AS-debug-wk2	🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	✅ 🧪 api-gtk
	🧪 vision-wk2	🧪 mac-intel-wk2	🛠 playstation
✅ 🛠 🧪 unsafe-merge	✅ 🛠 tv	🛠 mac-safer-cpp
	🛠 tv-sim
	🛠 watch
	🛠 watch-sim

[webkit-early-warning-system]

EWS run on current version of this PR (hash 573a08c)

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	🛠 win
	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	🧪 wpe-wk2	🧪 win-tests
✅ 🧪 webkitperl	🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe
	✅ 🧪 ios-wk2-wpt		✅ 🛠 wpe-cairo
	✅ 🧪 api-ios	🧪 mac-wk2	✅ 🛠 gtk
	✅ 🛠 vision	🧪 mac-AS-debug-wk2	🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-wk2-stress	✅ 🧪 api-gtk
	🧪 vision-wk2	🧪 mac-intel-wk2	🛠 playstation
✅ 🛠 🧪 unsafe-merge	✅ 🛠 tv	🛠 mac-safer-cpp
	🛠 tv-sim
	🛠 watch
	🛠 watch-sim

[webkit-commit-queue]

Committed 293523@main (7154d37): https://commits.webkit.org/293523@main

Reviewed commits have been landed. Closing PR #43905 and removing active labels.