Remove buffer change event order assertion

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

src/tokenized-buffer.coffee

@@ -188,17 +188,6 @@ class TokenizedBuffer extends Model
         row + delta
 
   bufferDidChange: (e) ->
-    if @lastBufferChangeEventId?
-      @assert(
-        @lastBufferChangeEventId is e.eventId - 1,
-        'Buffer Change Event Ids are not sequential',
-        (error) =>
-          error.metadata = {
-            tokenizedBufferEventId: @lastBufferChangeEventId,
-            nextTokenizedBufferEventId: e.eventId,
-          }
-      )
-    @lastBufferChangeEventId = e.eventId
     @changeCount = @buffer.changeCount
 
     {oldRange, newRange} = e