patch 8.2.5029: "textlock" is always zero

Problem:    "textlock" is always zero.
Solution:   Remove "textlock" and rename "textwinlock" to "textlock".
            (closes #10489)
diff --git a/src/globals.h b/src/globals.h
index bf098fd..3861e80 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -846,16 +846,11 @@
 				// allowed, e.g. when sourcing .exrc or .vimrc
 				// in current directory
 
-EXTERN int	textwinlock INIT(= 0);
+EXTERN int	textlock INIT(= 0);
 				// non-zero when changing text and jumping to
 				// another window or editing another buffer is
 				// not allowed
 
-EXTERN int	textlock INIT(= 0);
-				// non-zero when changing text is not allowed,
-				// jumping to another window is allowed,
-				// editing another buffer is not allowed.
-
 EXTERN int	curbuf_lock INIT(= 0);
 				// non-zero when the current buffer can't be
 				// changed.  Used for FileChangedRO.