CI: Remove customizations from cpplint config

We're going to just use the Google C++ coding style, so remove our
customizations. (We do still allow lines a little bit longer than the
limit that we give to clang-format, since sometimes clang-format will
format a line longer than 80 characters if the alternative is worse.)

[skip cpplint] since this will of course introduce many more linter
errors.
24 jobs for formatting in 14 minutes and 8 seconds (queued for 9 minutes and 47 seconds)
Status Job ID Name Coverage
  Source Check
passed #61972
cppcheck

00:00:36

passed #61973
cpplint

00:00:23

passed #61974
eslint

00:00:38

passed #61971
fedora

00:02:27

 
  Test
passed #61977
no_graphics

00:02:00

passed #61978
no_profiler

00:02:07

passed #61975
sanitizer_gcc

00:03:40

passed #61976
with_logging

00:02:14

 
  Manual
manual #61992
allowed to fail manual
armv8
manual #61979
allowed to fail manual
codequality
manual #61980
allowed to fail manual
code_statistics
manual #61994
allowed to fail manual
coverage
manual #61982
allowed to fail manual
fedora_gcc
manual #61983
allowed to fail manual
installed_tests
manual #61986
allowed to fail manual
lts
manual #61988
allowed to fail manual
packaging
manual #61993
allowed to fail manual
ppc64le
manual #61981
allowed to fail manual
sanitizer_clang
manual #61985
allowed to fail manual
ubuntu_clang
manual #61984
allowed to fail manual
ubuntu_gcc
manual #61987
allowed to fail manual
valgrind
manual #61991
allowed to fail manual
zeal_11
manual #61989
allowed to fail manual
zeal_2
manual #61990
allowed to fail manual
zeal_4