Only add view when grammars-loaded event fires

Previously the views would be added immediately
if more than one grammar was already registered.

This was unneeded since the event will always fire
after the package is activated.

src/packages/spell-check/lib/spell-check.coffee

@@ -9,10 +9,10 @@ module.exports =
     ]
 
   activate: ->
-    if syntax.grammars.length > 1
-      @subscribeToEditors()
-    else
-      syntax.on 'grammars-loaded', => @subscribeToEditors()
+    syntax.on 'grammars-loaded.spell-check', => @subscribeToEditors()
+
+  deactivate: ->
+    syntax.off '.spell-check'
 
   subscribeToEditors: ->
     rootView.eachEditor (editor) ->

src/packages/spell-check/spec/spell-check-spec.coffee

@@ -8,6 +8,7 @@ describe "Spell check", ->
     rootView.open('sample.js')
     config.set('spell-check.grammars', [])
     window.loadPackage('spell-check', activateImmediately: true)
+    syntax.trigger 'grammars-loaded'
     rootView.attachToDom()
     editor = rootView.getActiveView()