fix flow server compilation

Author: Onotole1

11_flow/server/build.gradle.kts

@@ -1,5 +1,3 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
-
 plugins {
     id("org.springframework.boot") version "3.5.5"
     id("io.spring.dependency-management") version "1.1.7"
@@ -10,7 +8,6 @@ plugins {
 
 group = "ru.netology"
 version = "0.0.1-SNAPSHOT"
-java.sourceCompatibility = JavaVersion.VERSION_17
 
 repositories {
     mavenCentral()