Revert "Add Apache Geode support (#366)"

This revert is done because Geode is not supported by Spring IO yet.

This reverts commit 1256a94d7e.

# Conflicts:
#	gradle.properties
#	settings.gradle

spring-session/build.gradle

@@ -45,6 +45,7 @@ dependencies {
 			"org.springframework.security:spring-security-core:$springSecurityVersion"
 
 	jacoco "org.jacoco:org.jacoco.agent:0.7.2.201409121644:runtime"
+
 }
 
 dependencyManagement {