zsh: set bindings without zvm

.zsh/bindings.zsh

@@ -1,5 +1,3 @@
-# as per https://github.com/jeffreytse/zsh-vi-mode#execute-extra-commands
-function zvm_after_lazy_keybindings() {
 # map Del escape sequence to actual Del key in all (n,i) modes to resemble vim instead of vi
 bindkey -a '^[[3~' delete-char
 # map arrow up/down to control fish-like history substring search and highlighting
@@ -18,4 +16,3 @@ function zvm_after_lazy_keybindings() {
 bindkey -M vicmd 'K' history-substring-search-up
 bindkey -M vicmd 'J' history-substring-search-down
 bindkey '^\' accept-and-hold
-}