rubocop: Remove useless assignments

.rubocop_todo.yml

@@ -6,15 +6,6 @@
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-# Offense count: 5
-Lint/UselessAssignment:
-  Exclude:
-    - '_contrib/comparelinks.rb'
-    - '_plugins/alerts.rb'
-    - '_plugins/glossary.rb'
-    - '_plugins/inline-template.rb'
-    - '_plugins/releases.rb'
-
 # Offense count: 20
 Metrics/AbcSize:
   Max: 136

_contrib/comparelinks.rb

@@ -29,7 +29,7 @@ end
 def fetchlinks()
   # Fetch new list of links
   links = {}
-  dirs = Dir.glob(WORKDIR + "/_site/**/*.html").each { |file|
+  Dir.glob(WORKDIR + "/_site/**/*.html").each { |file|
     content = File.read(file)
     content.scan(/ href *= *"(.*?)"/).each { |link|
       link = link[0].to_s.gsub(/^(https?:\/\/(www\.)?bitcoin\.org)?\//, '/')

_plugins/alerts.rb

@@ -70,7 +70,6 @@ module Jekyll
         lang = 'en'
         src = file
         dst = file
-        srcdir = '_alerts'
         dstdir = lang + '/alert'
         date = dst.split('-')
         next if date.length < 4

_plugins/glossary.rb

@@ -131,8 +131,6 @@ module Jekyll
 
         devsearches_json = []
         site.config["devsearches"].each { |cat, items|
-          devsearches_data_item = {}
-
           if cat == "Glossary"
             items.each { |language, list|
               list.each { |el|

_plugins/inline-template.rb

@@ -22,7 +22,7 @@ module Jekyll
       output = super
 
       data = YAML.load(output)
-      template = File.open(@template_name, mode = "r")
+      template = File.open(@template_name)
       @mytemplate = Liquid::Template.parse(template.read())
       @mytemplate.render('entry' => data)
     end

_plugins/releases.rb

@@ -82,7 +82,6 @@ module Jekyll
 
         lang = 'en'
         src = file
-        srcdir = '_releases'
         output_directory = lang + '/release'
         site.pages << ReleasePage.new(site, site.source, lang, '_releases', src, output_directory)
       end