Revert "Only call reset-prompt when the appropriate zstyle is set"

This reverts commit 6d00fdf8c8.

As unfortunate as it is, this workaround was a hack and doesn't take
into account prompts like spaceship which don't use $editor_info but
rely on $KEYMAP directly. We'll need to find a more consistent solution
to fix this.

modules/editor/README.md

@@ -26,8 +26,6 @@ zstyle ':prezto:module:editor' dot-expansion 'yes'
 
 ### PS Context
 
-**NOTE:** *This is deprecated and will be removed in future versions.*
-
 To enable the prompt context to be set, add the following to your
 *zpreztorc*.