Removed unused classes

Using dagger for Retrofit2, OkHttp and Gson

app/src/main/kotlin/com/meloda/fast/api/model/ApiResponse.kt

@@ -1,12 +0,0 @@
-package com.meloda.fast.api.model
-
-data class ApiResponse<T> constructor(
-    val isSuccessful: Boolean,
-    val error: Error?,
-    val response: T?
-)
-
-data class Error constructor(
-    val code: Long,
-    val message: String
-)

app/src/main/kotlin/com/meloda/fast/api/model/VKMessage.kt

@@ -1,7 +1,7 @@
 package com.meloda.fast.api.model
 
 import android.util.ArrayMap
-import com.meloda.fast.api.util.VKUtil
+import com.meloda.fast.api.VKUtil
 import org.json.JSONObject
 
 open class VKMessage() : VKModel() {

app/src/main/kotlin/com/meloda/fast/api/model/request/RequestMessagesGetConversations.kt

@@ -1,21 +0,0 @@
-package com.meloda.fast.api.model.request
-
-import com.google.gson.annotations.SerializedName
-
-class RequestMessagesGetConversations(
-    @SerializedName("offset")
-    private val offset: Int = 0,
-
-    @SerializedName("count")
-    private val count: Int = 0,
-
-    //values = all, unread
-    @SerializedName("filter")
-    private val filter: String = "",
-
-    @SerializedName("extended")
-    private val extended: Boolean = false,
-
-    @SerializedName("fields")
-    private var fields: String = ""
-)

app/src/main/kotlin/com/meloda/fast/api/model/response/MessagesResponse.kt

@@ -1,13 +0,0 @@
-package com.meloda.fast.api.model.response
-
-import android.os.Parcelable
-import kotlinx.parcelize.Parcelize
-
-class MessagesResponse(
-    val count: Int
-) {
-}
-
-@Parcelize
-data class GetConversationsResponse(val a: String) : Parcelable
-// TODO: 7/12/2021 use hilt for this like in LIR and make simple conversations' screen