runtime(doc): remove duplicate sentence in builtin.txt

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 3f52e10..b9d0719 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 9.1.  Last change: 2025 May 08
+*builtin.txt*	For Vim version 9.1.  Last change: 2025 May 09
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -2285,7 +2285,6 @@
 		Can also be used as a |method|: >
 			GetCursorPos()->cursor()
 <
-		Returns 0 when the position could be set, -1 otherwise.
 		Return type: |Number|