Remove obsolete Vi mode delete key workaround

As reported in
https://matrix.to/#/!YLTeaulxSDauOOxBoR:matrix.org/$n20_uqiMqatEQcPG79Ca0c2_YvHBHTr-yCVXTEuze_Y

commit f5fac096c0 (Don't move cursor in delete-char, 2017-04-19) fixed the
behavior of Vi mode keys "delete" and "x" when the cursor is at the end of
the buffer, and commit d51f669647 (Vi mode: avoid placing cursor beyond
last character, 2024-02-14) generalized this fix.

This means that the delete-specific fix is no longer necessary. Remove it.

Note that if the cursor is at end of a line but not the last line, the
behavior of "delete" in Vi mode is still wrong.  It should stay on the line.

share/functions/fish_vi_key_bindings.fish

@@ -113,13 +113,10 @@ function fish_vi_key_bindings --description 'vi-like key bindings for fish'
     bind -s --preset -M insert end end-of-line
     bind -s --preset -M default end end-of-line
 
-    # Vi moves the cursor back if, after deleting, it is at EOL.
-    # To emulate that, move forward, then backward, which will be a NOP
-    # if there is something to move forward to.
-    bind -s --preset -M default x delete-char 'set fish_cursor_end_mode exclusive' forward-single-char backward-char 'set fish_cursor_end_mode inclusive'
+    bind -s --preset -M default x delete-char
     bind -s --preset -M default X backward-delete-char
-    bind -s --preset -M insert delete delete-char forward-single-char backward-char
-    bind -s --preset -M default delete delete-char 'set fish_cursor_end_mode exclusive' forward-single-char backward-char 'set fish_cursor_end_mode inclusive'
+    bind -s --preset -M insert delete delete-char
+    bind -s --preset -M default delete delete-char
 
     # Backspace deletes a char in insert mode, but not in normal/default mode.
     bind -s --preset -M insert backspace backward-delete-char