update gemfile.lock

Gemfile.lock

@@ -15,7 +15,6 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     colorator (0.1)
-    diff-lcs (1.2.5)
     ethon (0.9.1)
       ffi (>= 1.3.0)
     execjs (2.7.0)
@@ -71,8 +70,6 @@ GEM
     jekyll-github-metadata (2.0.2)
       jekyll (~> 3.1)
       octokit (~> 4.0)
-    jekyll-last-modified-at (0.3.4)
-      jekyll
     jekyll-mentions (1.1.3)
       html-pipeline (~> 2.3)
       jekyll (~> 3.0)
@@ -138,19 +135,6 @@ GEM
       ffi (>= 0.5.0)
     redcarpet (3.3.4)
     rouge (1.11.1)
-    rspec (3.5.0)
-      rspec-core (~> 3.5.0)
-      rspec-expectations (~> 3.5.0)
-      rspec-mocks (~> 3.5.0)
-    rspec-core (3.5.4)
-      rspec-support (~> 3.5.0)
-    rspec-expectations (3.5.0)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.5.0)
-    rspec-mocks (3.5.0)
-      diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.5.0)
-    rspec-support (3.5.0)
     safe_yaml (1.0.4)
     sass (3.4.22)
     sawyer (0.7.0)
@@ -172,14 +156,12 @@ PLATFORMS
 
 DEPENDENCIES
   github-pages
-  jekyll-last-modified-at
   jekyll-redirect-from
   jekyll-sitemap
   jemoji
   octopress
   octopress-debugger
   rake
-  rspec
 
 BUNDLED WITH
    1.13.5