treewide: remove pmb:strict from options

pmbootstrap 3.11 is strict-by-default and previous versions had a broken
implementation which broke upon a full bootstrap of e.g. the systemd
repo. I think it's therefore safe to remove this already, even without
bumping pmbootstrap_min_version.

[ci:skip-vercheck]: doesn't affect any artifacts

Part-of: <https://gitlab.postmarketos.org/postmarketOS/pmaports/-/merge_requests/9112>

device/archived/device-dongshanpi-nezhastu/APKBUILD

@@ -8,8 +8,7 @@ pkgrel=0
 url="https://postmarketos.org"
 license="MIT"
 arch="riscv64"
-# pmb:strict: avoid grub-related install error during build with pmbootstrap
-options="!check !archcheck pmb:strict"
+options="!check !archcheck"
 depends="
 	linux-postmarketos-allwinner-d1
 	postmarketos-base

device/archived/device-lenovo-yoga-c630/APKBUILD

@@ -8,8 +8,7 @@ pkgrel=0
 url="https://postmarketos.org"
 license="MIT"
 arch="aarch64"
-# pmb:strict: avoid grub-related install error during build with pmbootstrap
-options="!check !archcheck pmb:strict"
+options="!check !archcheck"
 depends="postmarketos-base
 	linux-postmarketos-qcom-sdm845
 	systemd-boot

device/archived/device-mangopi-mq-pro/APKBUILD

@@ -8,8 +8,7 @@ pkgrel=0
 url="https://postmarketos.org"
 license="MIT"
 arch="riscv64"
-# pmb:strict: avoid grub-related install error during build with pmbootstrap
-options="!check !archcheck pmb:strict"
+options="!check !archcheck"
 depends="
 	linux-postmarketos-allwinner-d1
 	postmarketos-base