Code cleanup

Author: koji-1009

studyplus-android-sdk/src/main/java/jp/studyplus/android/sdk/StudyplusError.kt

@@ -1,11 +1,11 @@
 package jp.studyplus.android.sdk
 
 sealed class StudyplusError {
-    class IOException(val throwable: Throwable) : StudyplusError();
-    object BadRequest : StudyplusError();
-    object LoginRequired : StudyplusError();
-    object ServerError : StudyplusError();
-    object Unknown : StudyplusError();
+    class IOException(val throwable: Throwable) : StudyplusError()
+    object BadRequest : StudyplusError()
+    object LoginRequired : StudyplusError()
+    object ServerError : StudyplusError()
+    object Unknown : StudyplusError()
 
     companion object {
         fun byCode(code: Int) = when (code) {