chore(dep): remove org.jetbrains.kotlinx:kotlinx-serialization-json

Author: hyochan

openiap/build.gradle.kts

@@ -72,7 +72,6 @@ dependencies {
 
     // Google Play Billing Library (align with app/lib v8)
     api("com.android.billingclient:billing-ktx:8.0.0")
-    api("org.jetbrains.kotlinx:kotlinx-serialization-json:1.7.3")
 
     // Meta Horizon Billing compatibility client (only needed on the horizon flavor)
     add("horizonImplementation", "com.meta.horizon.billingclient.api:horizon-billing-compatibility:1.1.1")