Removes unused imports

quartz/src/main/java/com/vitorpamplona/quartz/encoders/Bech32Util.kt

@@ -36,8 +36,6 @@ package com.vitorpamplona.quartz.encoders
  * limitations under the License.
  */
 
-import kotlin.jvm.JvmStatic
-
 /**
  * Bech32 works with 5 bits values, we use this type to make it explicit: whenever you see Int5 it
  * means 5 bits values, and whenever you see Byte it means 8 bits values.

quartz/src/main/java/com/vitorpamplona/quartz/utils/Robohash.kt

@@ -25,7 +25,6 @@ import androidx.compose.runtime.Immutable
 import com.vitorpamplona.quartz.crypto.CryptoUtils
 import com.vitorpamplona.quartz.encoders.Hex
 import com.vitorpamplona.quartz.encoders.HexValidator
-import java.lang.StringBuilder
 
 object Robohash {
     private fun encodeColor(