removed mentioning of spark version 2.4.5 (#6)

Author: MKhalusova

Diff for: README.md

@@ -23,7 +23,7 @@ Currently, there are no kotlin-spark-api artifacts in maven central, but you can
 
 There is support for `Maven`, `Gradle`, `SBT`, and `leinengen` on JitPack.
 
-This project does not force you to use any specific version of Spark, but it has only been tested it with spark `3.0.0-preview2`. We believe it can work with Spark `2.4.5` but we cannot guarantee that.
+This project does not force you to use any specific version of Spark, but it has only been tested it with spark `3.0.0-preview2`. 
 
 So if you're using Maven you'll have to add the following into your `pom.xml`:
 

Diff for: docs/quick-start-guide.md

@@ -8,8 +8,7 @@ Prerequisites:
 - You need to have Java installed and have the JAVA_HOME environment variable pointing to the Java installation.
 - You need to have Apache Spark installed and have SPARK_HOME environment variable pointing to the Spark installation. 
 We recommend using Apache Spark 3.0.0-preview2 version. You can download it from the [Spark official website](https://spark.apache.org/downloads.html).
-
-Note: You can use Apache Spark 2.4.5, but we haven't tested Kotlin Spark API with it.   
+   
 
 ## Self-contained application