Removed unnecessary extension property

app/src/main/java/com/sirekanyan/knigopis/common/extensions/String.kt

@@ -1,15 +1,12 @@
 package com.sirekanyan.knigopis.common.extensions
 
 import android.net.Uri
-import java.util.*
 import kotlin.random.Random
 
 val RANDOM_ID = Array(16) { Random.nextInt(0, 16).toString(16) }.joinToString("")
 
 private val HTTP_SCHEMES = setOf("http", "https")
 
-val String.lowercase get() = lowercase(Locale.getDefault())
-
 fun String.toUriOrNull() =
     Uri.parse(this).takeIf(Uri::isValidHttpLink)
 

app/src/main/java/com/sirekanyan/knigopis/common/functions/StringFactory.kt

@@ -3,7 +3,6 @@ package com.sirekanyan.knigopis.common.functions
 import com.sirekanyan.knigopis.BuildConfig.APPLICATION_ID
 import com.sirekanyan.knigopis.MAIN_WWW
 import com.sirekanyan.knigopis.STATIC_API
-import com.sirekanyan.knigopis.common.extensions.lowercase
 
 fun extra(name: String) = "$APPLICATION_ID.extra_$name"
 
@@ -12,7 +11,7 @@ fun createUserPublicUrl(userId: String) = "$MAIN_WWW/#/user/books?u=$userId"
 fun createUserImageUrl(userId: String) = "$STATIC_API/user/$userId"
 
 fun createBookImageUrl(bookTitle: String): String {
-    val normalizedTitle = bookTitle.lowercase
+    val normalizedTitle = bookTitle.lowercase()
         .replace(Regex("\\W+"), "_")
         .replace(Regex("(^_|_$)"), "")
         .replace("ё", "е")

app/src/main/java/com/sirekanyan/knigopis/repository/cache/CacheKey.kt

@@ -1,11 +1,9 @@
 package com.sirekanyan.knigopis.repository.cache
 
-import com.sirekanyan.knigopis.common.extensions.lowercase
-
 enum class CacheKey {
 
     BOOKS, USERS, NOTES;
 
-    val storeValue get() = name.lowercase
+    val storeValue get() = name.lowercase()
 
 }