[skip ci] Remove useless files and solve AGP warnings (#1575)

* chore: Remove useless files

* [skip ci] refactor: Solve deprecation warnings from AGP

buildSrc/src/main/kotlin/AndroidConfig.kt

@@ -2,4 +2,5 @@ object AndroidConfig {
     const val compileSdk = 32
     const val minSdk = 21
     const val targetSdk = 32
+    const val namespace = "eu.kanade.tachiyomi.animeextension"
 }

buildSrc/src/main/kotlin/Dependencies.kt

@@ -1,9 +0,0 @@
-object Dependencies {
-    object kotlin {
-        const val version = "1.4.32"
-        const val stdlib = "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$version"
-    }
-
-    const val jsoup = "org.jsoup:jsoup:1.13.1"
-    const val okhttp = "com.squareup.okhttp3:okhttp:4.9.1"
-}