Bye v1(blocked by release) (#572)

It's a part of task in
#364. This should not be
merged until v1.30.0 is released.

---------

Co-authored-by: Motoi Okuzono <motoi.okuzono+github@gmail.com>

Author: Yang-33

.rubocop.yml

@@ -2,7 +2,6 @@ AllCops:
   TargetRubyVersion: 2.4
   Exclude:
     - 'examples/**/*'
-    - 'lib/line/bot/v1/**/*'
     - 'lib/line/bot/v2/channel_access_token/**/*'
     - 'lib/line/bot/v2/insight/**/*'
     - 'lib/line/bot/v2/liff/**/*'

Steepfile

@@ -5,7 +5,6 @@ target :lib do
   signature "sig-vendor"
 
   check "lib"
-  ignore "lib/line/bot/v1"
 
   library "net-http"