weeding: remove ensure_line_is_visible()

Since all lines can be partially scrolled off the screen now
(except for the top line of the edit window, which is forthcoming),
ensure_line_is_visible() is no longer needed.

src/files.c

@@ -1196,8 +1196,6 @@ void do_insertfile(void)
 		/* Update the cursor position to account for inserted lines. */
 		reset_cursor();
 
-		ensure_line_is_visible();
-
 		refresh_needed = TRUE;
 	    }
 

src/move.c

@@ -44,7 +44,6 @@ void do_last_line(void)
 
     /* Set the last line of the screen as the target for the cursor. */
     openfile->current_y = editwinrows - 1;
-    ensure_line_is_visible();
 
     refresh_needed = TRUE;
     focusing = FALSE;
@@ -341,19 +340,6 @@ void do_next_word_void(void)
     do_next_word(ISSET(WORD_BOUNDS), TRUE);
 }
 
-/* Make sure that the current line, when it is partially scrolled off the
- * screen in softwrap mode, is scrolled fully into view. */
-void ensure_line_is_visible(void)
-{
-#ifndef NANO_TINY
-    if (ISSET(SOFTWRAP) && strlenpt(openfile->current->data) / editwincols +
-				openfile->current_y >= editwinrows) {
-	adjust_viewport(ISSET(SMOOTH_SCROLL) ? FLOWING : CENTERING);
-	refresh_needed = TRUE;
-    }
-#endif
-}
-
 /* Move to the beginning of the current line (or softwrapped chunk).
  * If be_clever is TRUE, do a smart home when wanted and possible,
  * and do a dynamic home when in softwrap mode and it'spossible.

src/nano.c

@@ -1877,8 +1877,6 @@ void do_output(char *output, size_t output_len, bool allow_cntrls)
     }
 
 #ifndef NANO_TINY
-    ensure_line_is_visible();
-
     /* If the number of screen rows that a softwrapped line occupies
      * has changed, we need a full refresh. */
     if (ISSET(SOFTWRAP) && refresh_needed == FALSE)

src/proto.h

@@ -383,7 +383,6 @@ void do_prev_word(bool allow_punct, bool allow_update);
 void do_prev_word_void(void);
 bool do_next_word(bool allow_punct, bool allow_update);
 void do_next_word_void(void);
-void ensure_line_is_visible(void);
 void do_home(bool be_clever);
 void do_home_void(void);
 void do_end(bool be_clever);

src/text.c

@@ -179,8 +179,6 @@ void do_deletion(undo_type action)
 	return;
 
 #ifndef NANO_TINY
-    ensure_line_is_visible();
-
     /* If the number of screen rows that a softwrapped line occupies
      * has changed, we need a full refresh. */
     if (ISSET(SOFTWRAP) && refresh_needed == FALSE)