minor refactoring for testing

Author: akirasosa

app/src/androidTest/kotlin/com/hana053/micropost/testing/EspressoHelpers.kt

@@ -13,7 +13,7 @@ fun atPositionOnView(
     targetId: Int
 ) = object : BoundedMatcher<View, RecyclerView>(RecyclerView::class.java) {
 
-    override fun matchesSafely(recyclerView: RecyclerView): Boolean =
+    override fun matchesSafely(recyclerView: RecyclerView) =
         recyclerView.findViewHolderForAdapterPosition(position)
             .itemView
             .findViewById(targetId)

app/src/main/kotlin/com/hana053/micropost/pages/usershow/UserShowModule.kt

@@ -23,4 +23,3 @@ fun userShowModule() = Kodein.Module {
 
 }
 
-

app/src/test/kotlin/com/hana053/micropost/testing/TestSchedulerProxy.kt

@@ -28,7 +28,7 @@ internal class TestSchedulerProxy {
             }
         }
 
-        fun get(): TestSchedulerProxy = INSTANCE
+        fun get() = INSTANCE
     }
 
 }

app/src/testShared/kotlin/com/hana053/micropost/testing/EmptyResponseBody.kt

@@ -1,13 +1,11 @@
 package com.hana053.micropost.testing
 
-import okhttp3.MediaType
 import okhttp3.ResponseBody
-import okio.BufferedSource
 
 class EmptyResponseBody : ResponseBody() {
 
-    override fun contentType(): MediaType? = null
+    override fun contentType() = null
     override fun contentLength(): Long = 0
-    override fun source(): BufferedSource? = null
+    override fun source() = null
 
 }