Removed unused property (#656)

Author: lukasz-wolski

build.gradle

@@ -45,7 +45,6 @@ def versions = [
   junitPitest         : '1.2.1',
   jackson             : '2.19.2',
   log4j               : '2.24.3',
-  springVersion       : '5.3.39',
   logback             : '1.5.18',
   bouncycastle        : '1.80',
   restAssured         : '5.5.0',