Remove dependency on utbot-sample

Author: sergeypospelov

utbot-core/build.gradle

@@ -8,7 +8,6 @@ dependencies {
     implementation group: 'io.github.microutils', name: 'kotlin-logging', version: kotlin_logging_version
     implementation group: 'net.java.dev.jna', name: 'jna-platform', version: '5.5.0'
 
-    testImplementation project(':utbot-sample')
     testImplementation group: 'junit', name: 'junit', version: junit4_version
 }