zshrc: rm cruft, be ready for profiling

.zshrc

@@ -1,6 +1,4 @@
 # zmodload zsh/zprof
-# autoload -U compinit && compinit
-# zstyle ':omz:update' mode auto
 
 [ ! -d ~/.oh-my-zsh ] && sh -c "$(wget https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh -O -)"
 
@@ -216,3 +214,5 @@
  # repeatedly. The 'cache-path' directory in must be created manually.
  zstyle ':completion:*' use-cache on
  zstyle ':completion:*' cache-path $ZSH_CACHE_DIR
+
+# zprof