Remove unused Gradle dependencies

Remove dependencies flagged as unused by the Dependency Analysis Gradle Plugin
(`./gradlew buildHealth`) and explicitly declared in module build files.

Removals were skipped when the dependency provides transitively something the
module (or a consumer of an `api` dependency) uses directly, as well as for
runtime-only dependencies (element-call-embedded, sentry-android,
rustls-platform-verifier). Dependencies added by the convention plugin helpers
(composeDependencies, testCommonDependencies) are left untouched.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

libraries/wellknown/api/build.gradle.kts

@@ -12,7 +12,3 @@ plugins {
 android {
     namespace = "io.element.android.libraries.wellknown.api"
 }
-
-dependencies {
-    implementation(projects.libraries.matrix.api)
-}

libraries/wellknown/impl/build.gradle.kts

@@ -22,26 +22,9 @@ android {
 setupDependencyInjection()
 
 dependencies {
-    api(projects.libraries.wellknown.api)
-    implementation(libs.androidx.annotationjvm)
-    implementation(libs.coroutines.core)
     implementation(platform(libs.network.retrofit.bom))
-    implementation(libs.network.retrofit)
-    implementation(libs.serialization.json)
-    implementation(projects.libraries.core)
     implementation(projects.libraries.androidutils)
     implementation(projects.libraries.architecture)
-    implementation(projects.libraries.matrix.api)
-    implementation(projects.libraries.network)
-    implementation(projects.libraries.cachestore.api)
-    implementation(projects.features.enterprise.api)
-    implementation(projects.services.toolbox.api)
 
     testCommonDependencies(libs)
-    testImplementation(libs.coroutines.core)
-    testImplementation(projects.libraries.cachestore.test)
-    testImplementation(projects.libraries.matrix.test)
-    testImplementation(projects.libraries.wellknown.test)
-    testImplementation(projects.features.enterprise.test)
-    testImplementation(projects.services.toolbox.test)
 }

libraries/wellknown/test/build.gradle.kts

@@ -15,10 +15,5 @@ android {
 }
 
 dependencies {
-    implementation(libs.serialization.json)
-    implementation(projects.libraries.androidutils)
-    implementation(projects.libraries.matrix.api)
-    implementation(projects.libraries.wellknown.api)
-    implementation(projects.libraries.wellknown.impl)
     implementation(projects.tests.testutils)
 }