patch 9.0.0410: struct member cts_lnum is unused

Problem:    Struct member cts_lnum is unused.
Solution:   Delete it.

Author: brammool

src/charset.c

@@ -950,7 +950,6 @@ init_chartabsize_arg(
 {
     CLEAR_POINTER(cts);
     cts->cts_win = wp;
-    cts->cts_lnum = lnum;
     cts->cts_vcol = col;
     cts->cts_line = line;
     cts->cts_ptr = ptr;

src/structs.h

@@ -4599,7 +4599,6 @@ typedef struct {
 // Argument for lbr_chartabsize().
 typedef struct {
     win_T	*cts_win;
-    linenr_T	cts_lnum;	    // zero when not using text properties
     char_u	*cts_line;	    // start of the line
     char_u	*cts_ptr;	    // current position in line
 #ifdef FEAT_PROP_POPUP

src/version.c

@@ -703,6 +703,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    410,
 /**/
     409,
 /**/