Fix according to requested change.

Remove RootPreview and PreviewRootComponent in androidMain. Retains only
commonMain previews.

#20 (review)

Author: KentVu

compose-ui/build.gradle.kts

@@ -63,15 +63,8 @@ android {
         minSdk = libs.versions.android.minSdk.get().toInt()
     }
 
-    buildFeatures { compose = true }
-
     compileOptions {
         sourceCompatibility = JavaVersion.VERSION_11
         targetCompatibility = JavaVersion.VERSION_11
     }
 }
-
-dependencies {
-    // https://stackoverflow.com/a/68224436/1562087
-    debugImplementation(compose.uiTooling)
-}

compose-ui/src/androidMain/kotlin/com/example/myapplication/root/RootPreview.kt

@@ -1,5 +1,5 @@
 package com.example.myapplication.shared.main
 
 object PreviewMainComponent : MainComponent {
-    override fun onShowWelcomeClicked() = Unit
-}
+    override fun onShowWelcomeClicked() {}
+}