fix(correction)!: remove aliases for non standard commands

BREAKING CHANGE: This commit removes aliases for some commands that
previously were not being autocorrected. If you are using
autocorrection, please check it.

lib/correction.zsh

@@ -1,13 +1,8 @@
 if [[ "$ENABLE_CORRECTION" == "true" ]]; then
   alias cp='nocorrect cp'
-  alias ebuild='nocorrect ebuild'
-  alias gist='nocorrect gist'
-  alias heroku='nocorrect heroku'
-  alias hpodder='nocorrect hpodder'
   alias man='nocorrect man'
   alias mkdir='nocorrect mkdir'
   alias mv='nocorrect mv'
-  alias mysql='nocorrect mysql'
   alias sudo='nocorrect sudo'
   alias su='nocorrect su'