lib: remove CTRL-Backspace binding for vi keymaps

lib/key-bindings.zsh

@@ -77,8 +77,8 @@ bindkey -M vicmd '^?' backward-delete-char
 # [Delete] - delete forward
 if [[ -n "${terminfo[kdch1]}" ]]; then
   bindkey -M emacs "${terminfo[kdch1]}" delete-char
-  bindkey -M viins "${terminfo[kdch1]}" delete-char            # [Delete] - delete forward
-  bindkey -M vicmd "${terminfo[kdch1]}" delete-char            # [Delete] - delete forward
+  bindkey -M viins "${terminfo[kdch1]}" delete-char
+  bindkey -M vicmd "${terminfo[kdch1]}" delete-char
 else
   bindkey -M emacs "^[[3~" delete-char
   bindkey -M viins "^[[3~" delete-char
@@ -91,8 +91,6 @@ fi
 
 # [Ctrl-Backspace] - delete whole backward-word
 bindkey -M emacs '^H' backward-kill-word
-bindkey -M viins '^H' backward-kill-word
-bindkey -M vicmd '^H' backward-kill-word
 # [Ctrl-Delete] - delete whole forward-word
 bindkey -M emacs '^[[3;5~' kill-word
 bindkey -M viins '^[[3;5~' kill-word