Don't use config for scrollSensitivity in TextEditorComponent

Signed-off-by: Nathan Sobo <nathan@github.com>

src/text-editor.coffee

@@ -80,6 +80,7 @@ class TextEditor extends Model
   atomicSoftTabs: true
   invisibles: null
   showLineNumbers: true
+  scrollSensitivity: 40
 
   Object.defineProperty @prototype, "element",
     get: -> @getElement()
@@ -3359,6 +3360,10 @@ class TextEditor extends Model
 
   getScrollPastEnd: -> @scrollPastEnd
 
+  setScrollSensitivity: (@scrollSensitivity) ->
+
+  getScrollSensitivity: -> @scrollSensitivity
+
   setShowLineNumbers: (showLineNumbers) ->
     if showLineNumbers isnt @showLineNumbers
       @showLineNumbers = showLineNumbers