removed sdks compilation form the engine compilation

gradle.properties

@@ -11,7 +11,6 @@ jmeVersionTagID = 0
 buildJavaDoc = true
 
 # specify if SDK and Native libraries get built
-buildSdkProject = true
 buildNativeProjects = false
 buildAndroidExamples = false
 

settings.gradle

@@ -39,7 +39,3 @@ include 'jme3-examples'
 if(buildAndroidExamples == "true"){
     include 'jme3-android-examples'
 }
-
-if(buildSdkProject == "true"){
-    include 'sdk'
-}