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

docs/build.gradle

@@ -16,6 +16,10 @@ liveReload {
 	docRoot asciidoctor.sourceDir.canonicalPath
 }
 
+repositories {
+	maven { url 'http://dist.gemstone.com/maven/release' }
+}
+
 asciidoctorj {
 
 }
@@ -27,6 +31,7 @@ dependencies {
 				project(':spring-session-data-mongo'),
 				"org.springframework.data:spring-data-gemfire:$springDataGemFireVersion",
 				"org.springframework.data:spring-data-redis:$springDataRedisVersion",
+				"org.springframework.data:spring-data-gemfire:$springDataGemFireVersion",
 				"org.springframework:spring-websocket:${springVersion}",
 				"org.springframework:spring-messaging:${springVersion}",
 				"org.springframework:spring-jdbc:${springVersion}",