Remove solution from Challenge.kt (#199)

Co-authored-by: Igor Wojda <igor.wojda@gmail.com>

Author: redwanulsourav

src/test/kotlin/com/igorwojda/string/decapitalizeconst/Challenge.kt

@@ -4,17 +4,7 @@ import org.amshove.kluent.shouldBeEqualTo
 import org.junit.jupiter.api.Test
 
 private fun decapitalizeConst(str: String): String {
-    val subsStringsList =
-        str
-            .split("_")
-            .map { it.lowercase() }
-            .map { it.replaceFirstChar { string -> string.uppercaseChar() } }
-
-    return subsStringsList
-        .joinToString("")
-        .replaceFirstChar {
-            it.lowercaseChar()
-        }
+    TODO("Add your solution here")
 }
 
 private class Test {