diff --git a/kotlin-native/runtime/src/main/kotlin/kotlin/time/DurationNative.kt b/kotlin-native/runtime/src/main/kotlin/kotlin/time/DurationNative.kt
index 155b8215350..70567da899d 100644
--- a/kotlin-native/runtime/src/main/kotlin/kotlin/time/DurationNative.kt
+++ b/kotlin-native/runtime/src/main/kotlin/kotlin/time/DurationNative.kt
@@ -11,7 +11,3 @@ internal actual inline val durationAssertionsEnabled: Boolean get() = true
 
 @GCUnsafeCall("Kotlin_DurationValue_formatToExactDecimals")
 internal actual external fun formatToExactDecimals(value: Double, decimals: Int): String
-
-internal actual fun formatUpToDecimals(value: Double, decimals: Int): String {
-    return formatToExactDecimals(value, decimals).trimEnd('0')
-}
diff --git a/libraries/stdlib/js/src/kotlin/time/DurationJs.kt b/libraries/stdlib/js/src/kotlin/time/DurationJs.kt
index 37661def558..df50aa60e20 100644
--- a/libraries/stdlib/js/src/kotlin/time/DurationJs.kt
+++ b/libraries/stdlib/js/src/kotlin/time/DurationJs.kt
@@ -27,7 +27,3 @@ internal actual fun formatToExactDecimals(value: Double, decimals: Int): String
         if (rounded < 0) "-$positiveString" else positiveString
     }
 }
-
-internal actual fun formatUpToDecimals(value: Double, decimals: Int): String {
-    return value.asDynamic().toLocaleString("en-us", json("maximumFractionDigits" to decimals)).unsafeCast<String>()
-}
diff --git a/libraries/stdlib/jvm/src/kotlin/time/DurationJvm.kt b/libraries/stdlib/jvm/src/kotlin/time/DurationJvm.kt
index e904507dcc7..eb059020898 100644
--- a/libraries/stdlib/jvm/src/kotlin/time/DurationJvm.kt
+++ b/libraries/stdlib/jvm/src/kotlin/time/DurationJvm.kt
@@ -25,8 +25,3 @@ internal actual fun formatToExactDecimals(value: Double, decimals: Int): String
         createFormatForDecimals(decimals)
     return format.format(value)
 }
-
-internal actual fun formatUpToDecimals(value: Double, decimals: Int): String =
-    createFormatForDecimals(0)
-        .apply { maximumFractionDigits = decimals }
-        .format(value)
diff --git a/libraries/stdlib/src/kotlin/time/Duration.kt b/libraries/stdlib/src/kotlin/time/Duration.kt
index 8d7b5e18c6f..a7f80ef8f2a 100644
--- a/libraries/stdlib/src/kotlin/time/Duration.kt
+++ b/libraries/stdlib/src/kotlin/time/Duration.kt
@@ -1491,4 +1491,3 @@ private fun durationOfMillisNormalized(millis: Long) =
 internal expect val durationAssertionsEnabled: Boolean
 
 internal expect fun formatToExactDecimals(value: Double, decimals: Int): String
-internal expect fun formatUpToDecimals(value: Double, decimals: Int): String
diff --git a/libraries/stdlib/wasm/js/src/kotlin/time/Duration.kt b/libraries/stdlib/wasm/js/src/kotlin/time/Duration.kt
index d4690d62551..545fed15493 100644
--- a/libraries/stdlib/wasm/js/src/kotlin/time/Duration.kt
+++ b/libraries/stdlib/wasm/js/src/kotlin/time/Duration.kt
@@ -34,6 +34,3 @@ internal actual fun formatToExactDecimals(value: Double, decimals: Int): String
         if (rounded < 0) "-$positiveString" else positiveString
     }
 }
-
-internal actual fun formatUpToDecimals(value: Double, decimals: Int): String =
-    js("(value, decimals) => value.toLocaleString(\"en-us\", ({\"maximumFractionDigits\": decimals}))")
\ No newline at end of file
diff --git a/libraries/stdlib/wasm/wasi/src/kotlin/time/Duration.kt b/libraries/stdlib/wasm/wasi/src/kotlin/time/Duration.kt
index af80d8851ca..51878a6f2cb 100644
--- a/libraries/stdlib/wasm/wasi/src/kotlin/time/Duration.kt
+++ b/libraries/stdlib/wasm/wasi/src/kotlin/time/Duration.kt
@@ -14,6 +14,4 @@ internal actual fun formatToExactDecimals(value: Double, decimals: Int): String
     return (round / pow).toString()
 }
 
-internal actual fun formatUpToDecimals(value: Double, decimals: Int): String = TODO("Wasi Implement")
-
 internal actual inline val durationAssertionsEnabled: Boolean get() = true
\ No newline at end of file