Removed unnecessary `chomp`

As `String#split` with the default argument drops trailing newline
as a separator, preceding `String#chomp` is futile.

lib/net/smtp.rb

@@ -1042,7 +1042,7 @@ module Net
         return {} unless @string[3, 1] == '-'
         h = {}
         @string.lines.drop(1).each do |line|
-          k, *v = line[4..-1].chomp.split
+          k, *v = line[4..-1].split
           h[k] = v
         end
         h

spec/mspec/tool/sync/sync-rubyspec.rb

@@ -135,7 +135,7 @@ def rebase_commits(impl)
       else
         last_merge = `git log --grep='^#{impl.last_merge_message}' -n 1 --format='%H %ct'`
       end
-      last_merge, commit_timestamp = last_merge.chomp.split(' ')
+      last_merge, commit_timestamp = last_merge.split(' ')
 
       raise "Could not find last merge" unless last_merge
       puts "Last merge is #{last_merge}"

test/ruby/test_process.rb

@@ -2381,7 +2381,7 @@ EOS
       end
       w.close
       assert_equal "exec failed\n", r.gets
-      vals = r.gets.chomp.split.map!(&:to_i)
+      vals = r.gets.split.map!(&:to_i)
       assert_operator vals[0], :>, vals[1], vals.inspect
       _, status = Process.waitpid2(pid)
     end