Removed surplus back command that was causing AppShare workload to fail

wlauto/workloads/appshare/uiauto/src/com/arm/wlauto/uiauto/UiAutomation.java

@@ -32,7 +32,6 @@ public class UiAutomation extends UxPerfUiAutomation {
     public void runUiAutomation() throws Exception {
         // Override superclass value
         this.uiAutoTimeout = TimeUnit.SECONDS.toMillis(10);    
-        
         parameters = getParams();
 
         // Setup the three uiautomator classes with the correct information
@@ -63,7 +62,6 @@ public class UiAutomation extends UxPerfUiAutomation {
         // Skype won't allow us to login and share on first visit so invoke
         // once more from googlephotos
         pressBack();        
-        pressBack();
         sendToSkype(contactName);
 
         unsetScreenOrientation();