settings: drop foojay toolchain resolver (reproducible-build safe)

Calendula consumes the kit as an included build and publishes via official
F-Droid reproducible builds, whose offline source scanner rejects the foojay
toolchain resolver (it can fetch a JDK at build time). The kit never used a
Java toolchain block — modules set jvmTarget directly — so the resolver was
dead weight that would have broken Calendula's reproducibility invariant.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

settings.gradle.kts

@@ -11,9 +11,12 @@ pluginManagement {
         gradlePluginPortal()
     }
 }
-plugins {
-    id("org.gradle.toolchains.foojay-resolver-convention") version "1.0.0"
-}
+
+// NB: deliberately NO foojay toolchain resolver. Consuming apps build this as an
+// included build, and Calendula publishes via official F-Droid reproducible
+// builds, whose offline source scanner rejects org.gradle.toolchains.foojay-resolver
+// (it can fetch a JDK at build time). Modules here set jvmTarget directly and
+// must not use a Java toolchain block that would need a resolver.
 
 dependencyResolutionManagement {
     repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)