patch 8.0.1114: default for 'iminsert' is annoying

Problem:    Default for 'iminsert' is annoying.
Solution:   Make the default always zero. (Yasuhiro Matsumoto, closes #2071)
diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index 859fbe8..3072793 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -4299,7 +4299,7 @@
 	may change in later releases.
 
 						*'iminsert'* *'imi'*
-'iminsert' 'imi'	number (default 0, 2 when an input method is supported)
+'iminsert' 'imi'	number (default 0)
 			local to buffer
 			{not in Vi}
 	Specifies whether :lmap or an Input Method (IM) is to be used in
@@ -4322,7 +4322,7 @@
 	methods.  Use 'imdisable' to disable XIM then.
 
 						*'imsearch'* *'ims'*
-'imsearch' 'ims'	number (default 0, 2 when an input method is supported)
+'imsearch' 'ims'	number (default -1)
 			local to buffer
 			{not in Vi}
 	Specifies whether :lmap or an Input Method (IM) is to be used when