patch 8.1.1280: remarks about functionality not in Vi clutters the help

Problem:    Remarks about functionality not in Vi clutters the help.
Solution:   Move all info about what is new in Vim or already existed in Vi to
            vi_diff.txt.  Remove {not in Vi} remarks. (closes #4268) Add
            "noet" to the help files modeline.  Also include many other help
            file improvements.
diff --git a/runtime/doc/netbeans.txt b/runtime/doc/netbeans.txt
index 495f0d4..31d6907 100644
--- a/runtime/doc/netbeans.txt
+++ b/runtime/doc/netbeans.txt
@@ -1,4 +1,4 @@
-*netbeans.txt*  For Vim version 8.1.  Last change: 2019 Jan 17
+*netbeans.txt*  For Vim version 8.1.  Last change: 2019 May 05
 
 
 		  VIM REFERENCE MANUAL    by Gordon Prieur et al.
@@ -24,7 +24,6 @@
     10.4. Obtaining the External Editor Module	|obtaining-exted|
     10.5. Setting up NetBeans to run with Vim	|netbeans-setup|
 
-{Vi does not have any of these features}
 {only available when compiled with the |+netbeans_intg| feature}
 
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