Revert "Handle non-bzipped data also in AsciicastDecorator"

This reverts commit 9d08c17087.

app/decorators/asciicast_decorator.rb

@@ -32,17 +32,11 @@ class AsciicastDecorator < ApplicationDecorator
     saved_time = 0
 
     if file = stdout_timing.file
-      data = file.read
-
-      if data[0] == 'B' and data[1] == 'Z'
-        f = IO.popen "bzip2 -d", "r+"
-        f.write data
-        f.close_write
-        lines = f.readlines
-        f.close
-      else
-        lines = data.split("\n")
-      end
+      f = IO.popen "bzip2 -d", "r+"
+      f.write file.read
+      f.close_write
+      lines = f.readlines
+      f.close
 
       data = lines.map do |line|
         delay, n = line.split