remove unnecessary quotes in .travis.yml

I just want travis to run these tests again

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - "iojs-v1.8"
+  - iojs-v1.8
 before_install:
   - sudo apt-get install libcairo2-dev libjpeg8-dev libpango1.0-dev libgif-dev build-essential g++
 script:
@@ -8,7 +8,7 @@ script:
 notifications:
   irc:
     channels:
-      - "irc.esper.net#crafatar"
+      - irc.esper.net#crafatar
     skip_join: true
 services:
   - redis-server