travis: do not import missing File::Tail::Multi

.travis.yml

@@ -24,7 +24,6 @@ install:
   - cpanm --notest Device::SerialPort
   - cpanm --notest FCGI::Client
   - cpanm --notest File::ReadBackwards
-  - cpanm --notest File::Tail::Multi
   - cpanm --notest Graphics::ColorObject
   - cpanm --notest IPC::Run3
   - cpanm --notest IPC::ShareLite
@@ -55,6 +54,7 @@ install:
   # - Sys::Virt version matching the test system's libvirt-dev
   - cpanm --notest DANBERR/Sys-Virt-0.9.8.tar.gz
   # Modules used by plugins, but missing on cpan
+  # - File::Tail::Multi
   # - Sun::Solaris::Kstat
   # - VMware::VIRuntime
   # - MythTV