* lib/rubygems/*: Remove unused variables warnings

Patch by Run Paint [ruby-core:30991]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29725 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/commands/build_command.rb

@@ -35,7 +35,7 @@ class Gem::Commands::BuildCommand < Gem::Command
           while not f.eof? and spec = Gem::Specification.from_yaml(f)
             result << spec
           end
-        rescue Gem::EndOfYAMLException => e
+        rescue Gem::EndOfYAMLException
           # OK
         end
       end

lib/rubygems/commands/check_command.rb

@@ -71,7 +71,7 @@ class Gem::Commands::CheckCommand < Gem::Command
       say "Verifying gem: '#{gem_name}'"
       begin
         Gem::Validator.new.verify_gem_file(gem_name)
-      rescue Exception => e
+      rescue Exception
         alert_error "#{gem_name} is invalid."
       end
     end

lib/rubygems/commands/query_command.rb

@@ -161,19 +161,19 @@ class Gem::Commands::QueryCommand < Gem::Command
     end
 
     versions.each do |gem_name, matching_tuples|
-      matching_tuples = matching_tuples.sort_by do |(name, version,_),_|
+      matching_tuples = matching_tuples.sort_by do |(_, version,_),_|
         version
       end.reverse
 
       platforms = Hash.new { |h,version| h[version] = [] }
 
-      matching_tuples.map do |(name, version, platform,_),_|
+      matching_tuples.map do |(_, version, platform,_),_|
         platforms[version] << platform if platform
       end
 
       seen = {}
 
-      matching_tuples.delete_if do |(name, version,_),_|
+      matching_tuples.delete_if do |(_, version,_),_|
         if seen[version] then
           true
         else
@@ -186,7 +186,7 @@ class Gem::Commands::QueryCommand < Gem::Command
 
       if options[:versions] then
         list = if platforms.empty? or options[:details] then
-                 matching_tuples.map { |(name, version,_),_| version }.uniq
+                 matching_tuples.map { |(_, version,_),_| version }.uniq
                else
                  platforms.sort.reverse.map do |version, pls|
                    if pls == [Gem::Platform::RUBY] then

lib/rubygems/commands/server_command.rb

@@ -17,7 +17,7 @@ class Gem::Commands::ServerCommand < Gem::Command
       else
         begin
           Socket.getservbyname port
-        rescue SocketError => e
+        rescue SocketError
           raise OptionParser::InvalidArgument, "#{port}: no such named service"
         end
       end

lib/rubygems/commands/update_command.rb

@@ -181,11 +181,11 @@ class Gem::Commands::UpdateCommand < Gem::Command
         end
       end
 
-      matching_gems = spec_tuples.select do |(name, version, platform),|
+      matching_gems = spec_tuples.select do |(name, _, platform),|
         name == l_name and Gem::Platform.match platform
       end
 
-      highest_remote_gem = matching_gems.sort_by do |(name, version),|
+      highest_remote_gem = matching_gems.sort_by do |(_, version),|
         version
       end.last