Simplified old gitstatus, eliminating a git command if no upstream branch is found

gitstatus_pre-1.7.10.sh

@@ -84,12 +84,6 @@ else
   upstream=$( git rev-parse --abbrev-ref ${branch}@{upstream} 2>&1 )
 
   if [[ $? == 0 ]]; then
-    has_remote_tracking=1
-  else
-    has_remote_tracking=0
-    unset upstream
-  fi
-
      # get the revision list, and count the leading "<" and ">"
     revgit=$( git rev-list --left-right ${remote_ref}...HEAD 2>/dev/null )
     if [[ $? == 0 ]]; then
@@ -103,16 +97,16 @@ else
         remote="${remote}_AHEAD_${num_ahead}"
       fi
     fi
+  else
+    remote='_NO_REMOTE_TRACKING_'
+    unset upstream
+  fi
 fi
 
 if [[ -z "$remote" ]] ; then
   remote='.'
 fi
 
-if [[ "$has_remote_tracking" == "0" ]] ; then
-  remote='_NO_REMOTE_TRACKING_'
-fi
-
 if [[ -z "$upstream" ]] ; then
   upstream='^'
 fi