Remove unecessary build properties

Author: jzheaux

gradle.properties

@@ -1,12 +1,2 @@
-aspectjVersion=1.9.8.RC3
-springJavaformatVersion=0.0.29
-springBootVersion=2.4.2
-springFrameworkVersion=6.0.0-M1
-openSamlVersion=3.4.6
 version=3.0.0-SNAPSHOT
-queryDslVersion = '4.0.9'
-kotlinVersion=1.5.31
-samplesBranch=6.0.x
-org.gradle.jvmargs=-Xmx3g -XX:+HeapDumpOnOutOfMemoryError
 org.gradle.caching=true
-kotlin.stdlib.default.dependency=false