removed unused variable

Author: Shahroz16

datapipelines/api/datapipelines.api

@@ -174,7 +174,6 @@ public final class io/customer/sdk/CustomerIO : io/customer/sdk/DataPipelineInst
 	public fun getProfileAttributes ()Ljava/util/Map;
 	public fun getRegisteredDeviceToken ()Ljava/lang/String;
 	public fun getUserId ()Ljava/lang/String;
-	public final fun getWriteKey ()Ljava/lang/String;
 	public fun identify (Ljava/lang/String;Ljava/lang/Object;Lkotlinx/serialization/SerializationStrategy;)V
 	public fun initialize ()V
 	public static final fun instance ()Lio/customer/sdk/CustomerIO;

datapipelines/src/main/kotlin/io/customer/sdk/CustomerIO.kt

@@ -292,9 +292,6 @@ class CustomerIO private constructor(
     override val userId: String?
         get() = analytics.userId()
 
-    val writeKey: String
-        get() = analytics.configuration.writeKey
-
     override var deviceAttributes: CustomAttributes
         get() = emptyMap()
         set(value) {