Remove KotlinJsonAdapterFactory (moshi-kotlin) dependency from generated code

Author: macisamuele

gradle-plugin/plugin/src/main/resources/kotlin/tools/GeneratedCodeConverters.kt.mustache

@@ -1,14 +1,12 @@
 package {{packageName}}.tools
 
 import com.squareup.moshi.Moshi
-import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory
 import retrofit2.Converter
 import retrofit2.converter.moshi.MoshiConverterFactory
 
 object GeneratedCodeConverters {
     private val moshi = Moshi.Builder()
             .add(XNullableAdapterFactory())
-            .add(KotlinJsonAdapterFactory())
             .add(TypesAdapterFactory())
             .build()