Revert "Play with codecov via Travis"

No support for Perl yet. (And sudo would have been needed, too.)

This reverts commit f1062dd.

.travis.yml

@@ -10,7 +10,6 @@ perl:
 before_install:
    - sudo apt-get update
    - sudo apt-get install devscripts rsync lsof
-   - pip install codecov
 
 install:
    - yes '' | cpanm --verbose --notest --skip-satisfied Config::File File::BaseDir File::Rsync File::Slurp File::Touch File::Which Moo Test::Differences Test::File Devel::Cover::Report::Coveralls String::Random String::Expand
@@ -21,7 +20,6 @@ script:
 
 after_success:
    - make coveralls
-   - codecov
 
 notifications:
   irc: "irc.lugs.ch#kivamon"