Remove references to JsonElement from format validator

Author: OptimumCode

json-schema-validator/src/commonMain/kotlin/io/github/optimumcode/json/schema/FormatValidator.kt

@@ -1,12 +1,11 @@
 package io.github.optimumcode.json.schema
 
 import io.github.optimumcode.json.schema.model.AbstractElement
-import kotlinx.serialization.json.JsonElement
 import kotlin.jvm.JvmStatic
 
 /**
- * The [FormatValidator] is used to check whether the [JsonElement] matches the expected format.
- * If the [JsonElement] is not of the required type (e.g. validator expects string but the [JsonElement] is an object)
+ * The [FormatValidator] is used to check whether the [AbstractElement] matches the expected format.
+ * If the [AbstractElement] is not of the required type (e.g. validator expects string but the [AbstractElement] is an object)
  * the validator **MUST** return [FormatValidator.Valid] result
  */
 @ExperimentalApi