Before uninstalling a module, you may want to use the instmodsh command to determine if the module is installed.

~]# instmodsh
Available commands are:
   l            - List all installed modules
   m <module>   - Select a module
   q            - Quit the program
cmd? l
Installed modules are:
   Alien::Build
   Alien::GMP
   Alien::m4
   Capture::Tiny
   Crypt::Curve25519
   Crypt::IDEA
   CryptX
   Digest::BubbleBabble
   ExtUtils::MakeMaker
   FFI::CheckLib
   File::Which
   File::chdir
   Math::GMP
   Math::Int64
   Mojo::DOM58
   Net::SFTP
   Net::SSH::Perl
   Path::Tiny
   Perl
   Sort::Versions
   String::CRC32
   Test::Simple
   install
   local::lib
cmd? q

The cpanm command with the --uninstall flag can be used to uninstall a module.

cpanm --uninstall Log::Log4perl

The --local-lib option can be used to point to a specific directory if the module is installed in a non-standard directory.

cpanm --uninstall --local-lib /path/to/my/perl/modules Log::Log4perl