d/control: Drop unused B-D on libgirepository1.0-dev

• d/control: Drop unused B-D on libgirepository1.0-dev

  Closes: #1116592

---

I've confirmed using diffoscope that this results in the same binary package contents as a reference build without this change. Not otherwise tested.

This removes several build-dependencies:

│ ├── Installed-Build-Depends
│ │ @@ -57,27 +57,23 @@
│ │   gettext-base (= 0.23.1-2+b1),
│ │   gir1.2-atk-1.0 (= 2.58.0-1),
│ │   gir1.2-atspi-2.0 (= 2.58.0-1),
│ │   gir1.2-cloudproviders-0.3.0 (= 0.3.6-3),
│ │   gir1.2-freedesktop (= 1.86.0-5),
│ │   gir1.2-freedesktop-dev (= 1.86.0-5),
│ │   gir1.2-gdkpixbuf-2.0 (= 2.42.12+dfsg-5),
│ │ - gir1.2-girepository-2.0 (= 1.86.0-5),
│ │ - gir1.2-girepository-2.0-dev (= 1.86.0-5),
│ │   gir1.2-glib-2.0 (= 2.84.4-3),
│ │   gir1.2-glib-2.0-dev (= 2.84.4-3),
│ │   gir1.2-gst-plugins-base-1.0 (= 1.26.6-1),
│ │   gir1.2-gstreamer-1.0 (= 1.26.6-1),
│ │   gir1.2-gtk-3.0 (= 3.24.50-2),
│ │   gir1.2-gudev-1.0 (= 238-7),
│ │   gir1.2-harfbuzz-0.0 (= 11.5.0-1),
│ │   gir1.2-pango-1.0 (= 1.56.3-2),
│ │   girepository-tools (= 2.84.4-3),
│ │ - gobject-introspection (= 1.86.0-5),
│ │ - gobject-introspection-bin (= 1.86.0-5),
│ │   grep (= 3.12-1),
│ │   groff-base (= 1.23.0-9),
│ │   gstreamer1.0-plugins-base (= 1.26.6-1),
│ │   gtk-update-icon-cache (= 4.20.1+ds-2),
│ │   gzip (= 1.13-1),
│ │   hicolor-icon-theme (= 0.18-2),
│ │   hostname (= 3.25),
│ │ @@ -201,18 +197,15 @@
│ │   libgdbm6t64 (= 1.26-1),
│ │   libgdk-pixbuf-2.0-0 (= 2.42.12+dfsg-5),
│ │   libgdk-pixbuf-2.0-dev (= 2.42.12+dfsg-5),
│ │   libgdk-pixbuf2.0-bin (= 2.42.12+dfsg-5),
│ │   libgdk-pixbuf2.0-common (= 2.42.12+dfsg-5),
│ │   libgio-2.0-dev (= 2.84.4-3),
│ │   libgio-2.0-dev-bin (= 2.84.4-3),
│ │ - libgirepository-1.0-1 (= 1.86.0-5),
│ │ - libgirepository-1.0-dev (= 1.86.0-5),
│ │   libgirepository-2.0-0 (= 2.84.4-3),
│ │ - libgirepository1.0-dev (= 1.86.0-5),
│ │   libgl-dev (= 1.7.0-1+b2),
│ │   libgl1 (= 1.7.0-1+b2),
│ │   libgl1-mesa-dri (= 25.2.3-1),
│ │   libgles-dev (= 1.7.0-1+b2),
│ │   libgles1 (= 1.7.0-1+b2),
│ │   libgles2 (= 1.7.0-1+b2),
│ │   libglib2.0-0t64 (= 2.84.4-3),
│ │ @@ -622,17 +615,14 @@
│ │   procps (= 2:4.0.4-9),
│ │   python3 (= 3.13.7-1),
│ │   python3-autocommand (= 2.2.2-3),
│ │   python3-inflect (= 7.5.0-1),
│ │   python3-jaraco.context (= 6.0.1-1),
│ │   python3-jaraco.functools (= 4.1.0-1),
│ │   python3-jaraco.text (= 4.0.0-1),
│ │ - python3-mako (= 1.3.10-3),
│ │ - python3-markdown (= 3.9-1),
│ │ - python3-markupsafe (= 3.0.2-2),
│ │   python3-minimal (= 3.13.7-1),
│ │   python3-more-itertools (= 10.8.0-1),
│ │   python3-packaging (= 25.0-1),
│ │   python3-pkg-resources (= 78.1.1-0.1),
│ │   python3-setuptools (= 78.1.1-0.1),
│ │   python3-typeguard (= 4.4.4-1),
│ │   python3-typing-extensions (= 4.15.0-1),