build, qt: Drop unneeded direct dependency on freetype
Only fontconfig directly depends on freetype.
Guix builds on x86_64:
$ find guix-build-$(git rev-parse --short=12 HEAD)/output/ -type f -print0 | env LC_ALL=C sort -z | xargs -r0 sha256sum
02a5522a0e58ff9b330e84922419ea99516fcb1e74ba0e1deb94babe7f5dbf2b guix-build-cc7542cc9552/output/aarch64-linux-gnu/SHA256SUMS.part
9c6e0f38f37556da2a8e77f920253b81faccd680211e9c5f1c11f6f66c9ea786 guix-build-cc7542cc9552/output/aarch64-linux-gnu/bitcoin-cc7542cc9552-aarch64-linux-gnu-debug.tar.gz
2267be7ef95cde2c6229f6b64952fd46e79df173041bebb86d2cd32149c0f1d3 guix-build-cc7542cc9552/output/aarch64-linux-gnu/bitcoin-cc7542cc9552-aarch64-linux-gnu.tar.gz
c6aeb65c25318fd6d8490dd73783c1eb6ad9774de235051b8750781cfd7639fa guix-build-cc7542cc9552/output/arm-linux-gnueabihf/SHA256SUMS.part
abe9b9ed8202242815d1efcfc7e345ff79b34ed880abf091a87b179bc312a4ff guix-build-cc7542cc9552/output/arm-linux-gnueabihf/bitcoin-cc7542cc9552-arm-linux-gnueabihf-debug.tar.gz
b34ed8fc29b9ac03b96f30d69d10bedbccbacbbfc6fe5a3214d74da457950074 guix-build-cc7542cc9552/output/arm-linux-gnueabihf/bitcoin-cc7542cc9552-arm-linux-gnueabihf.tar.gz
02d95ef4c118304250acce282ab17a6d68b00fffc1e28446bd77755019295959 guix-build-cc7542cc9552/output/arm64-apple-darwin/SHA256SUMS.part
99c6e1c87e679131f1badb3a30b65569500d5f1378c3b0ea4d0bfa1550f682ad guix-build-cc7542cc9552/output/arm64-apple-darwin/bitcoin-cc7542cc9552-arm64-apple-darwin-unsigned.dmg
5c2ae0147c9675c8a6dc956a0449372d76eb30739e3390d740bcb64af804351e guix-build-cc7542cc9552/output/arm64-apple-darwin/bitcoin-cc7542cc9552-arm64-apple-darwin-unsigned.tar.gz
f530c398a6620de3f5a0bb7ec5000e449810f809ea70bdbb09b7d8d6039f4dc0 guix-build-cc7542cc9552/output/arm64-apple-darwin/bitcoin-cc7542cc9552-arm64-apple-darwin.tar.gz
d697c2dca125e0af51945034185eb1868df70aab21812ec922d24a933224b5cf guix-build-cc7542cc9552/output/dist-archive/bitcoin-cc7542cc9552.tar.gz
cb807947b6d729141eda185bf138d3a28aedf936159e70c22dbe6b6cd759db50 guix-build-cc7542cc9552/output/powerpc64-linux-gnu/SHA256SUMS.part
368221a179f97e415dbef1a2d95917ee8ba24bd68a826ae4cc7edb1aa3364c9f guix-build-cc7542cc9552/output/powerpc64-linux-gnu/bitcoin-cc7542cc9552-powerpc64-linux-gnu-debug.tar.gz
c8c3822c2f16e43a87999c31f7f9821f28344cf745da0009561b823543a0d8e5 guix-build-cc7542cc9552/output/powerpc64-linux-gnu/bitcoin-cc7542cc9552-powerpc64-linux-gnu.tar.gz
ab3ac5f3144cebef532151732045b53d96912ba6e15f88efe3dfc84f939c9ee2 guix-build-cc7542cc9552/output/powerpc64le-linux-gnu/SHA256SUMS.part
1218a9e3dbf5eaa2a23c086d623be03ec9deffd24f3ba58e1765f5bf0cc3d793 guix-build-cc7542cc9552/output/powerpc64le-linux-gnu/bitcoin-cc7542cc9552-powerpc64le-linux-gnu-debug.tar.gz
6f4ad0507d40cd194d9790c4d68795890bcecb32d77f9142e2c1edd06a89c75c guix-build-cc7542cc9552/output/powerpc64le-linux-gnu/bitcoin-cc7542cc9552-powerpc64le-linux-gnu.tar.gz
7f16d8781b604b4d13c09f2060c2222d17659b1c93a02ca27f9c7285dbcf2c87 guix-build-cc7542cc9552/output/riscv64-linux-gnu/SHA256SUMS.part
f0b2dcca08c6c068c858b715849d3bf33fe10954939383df523f87cbeb17ddaf guix-build-cc7542cc9552/output/riscv64-linux-gnu/bitcoin-cc7542cc9552-riscv64-linux-gnu-debug.tar.gz
b392a1755d98ca0a58036d04b7291971c05f58964537cc0731d17949fbdfd4bc guix-build-cc7542cc9552/output/riscv64-linux-gnu/bitcoin-cc7542cc9552-riscv64-linux-gnu.tar.gz
f044eb2a465bd889d7621416b9d5a20edd061e77eb4ab141bc15f13f8640b3d9 guix-build-cc7542cc9552/output/x86_64-apple-darwin/SHA256SUMS.part
af4867fe1d4453e0c257e9b47e58511b39ab84ab8726a8e807f1486e3918cdad guix-build-cc7542cc9552/output/x86_64-apple-darwin/bitcoin-cc7542cc9552-x86_64-apple-darwin-unsigned.dmg
77ce9fcb94432c5d5b7a66a00620bad0b17ea7790615c2a22cfabd94c73dc0fb guix-build-cc7542cc9552/output/x86_64-apple-darwin/bitcoin-cc7542cc9552-x86_64-apple-darwin-unsigned.tar.gz
73d41ef67086db682d9655db79704de027334748295cc3983ecae1319a4beab6 guix-build-cc7542cc9552/output/x86_64-apple-darwin/bitcoin-cc7542cc9552-x86_64-apple-darwin.tar.gz
ff396f8749be86ad71d26203b7daffaeec02e882766f7e047738a5324c40f273 guix-build-cc7542cc9552/output/x86_64-linux-gnu/SHA256SUMS.part
2d88d2bbc9219ac7dab2dff9418901e2a3daf7cb71662dfb4be6e845c263bc08 guix-build-cc7542cc9552/output/x86_64-linux-gnu/bitcoin-cc7542cc9552-x86_64-linux-gnu-debug.tar.gz
e9c75bdd41c1cf81a531b578f0d6188939e6c5b023a04e34d838ce11da5e171a guix-build-cc7542cc9552/output/x86_64-linux-gnu/bitcoin-cc7542cc9552-x86_64-linux-gnu.tar.gz
1540b3997c28e2584900fcf9d8f287be79d36e5135108bf7b41a257153886dc5 guix-build-cc7542cc9552/output/x86_64-w64-mingw32/SHA256SUMS.part
69f77d496676646ee94fe3239c897a0631476dea4d5bea80396aa051a3384d1f guix-build-cc7542cc9552/output/x86_64-w64-mingw32/bitcoin-cc7542cc9552-win64-debug.zip
87b02e9781a5a5544207cd71f51f78e17d5e496106dac71392d8ac9c125e08a6 guix-build-cc7542cc9552/output/x86_64-w64-mingw32/bitcoin-cc7542cc9552-win64-setup-unsigned.exe
5cc8e5d0d50e10744f8fd628cddf4aed0c1a25635e6d978db697e5d0b14e0cc2 guix-build-cc7542cc9552/output/x86_64-w64-mingw32/bitcoin-cc7542cc9552-win64-unsigned.tar.gz
fa3b4d2d3ed1b8e4e7cd6bb0ca8af4f882ff0238cfbe7d42844aba3f2cd551d0 guix-build-cc7542cc9552/output/x86_64-w64-mingw32/bitcoin-cc7542cc9552-win64.zip