Remove --base-path option

[mirpedrol]

As discussed in #1732
Remove --base-path option.

PR checklist

• This comment contains a description of changes (with reason)
• CHANGELOG.md is updated
• If you've fixed a bug or added code that should be tested, add tests!
• Documentation in docs is updated

[codecov]

Codecov Report

Merging #1754 (1e6513d) into dev (3cad041) will decrease coverage by 0.06%.
The diff coverage is 81.57%.

@@            Coverage Diff             @@
##              dev    #1754      +/-   ##
==========================================
- Coverage   68.52%   68.46%   -0.07%     
==========================================
  Files          59       59              
  Lines        7152     7131      -21     
==========================================
- Hits         4901     4882      -19     
+ Misses       2251     2249       -2     

Impacted Files	Coverage Δ
nf_core/modules/info.py	17.03% <50.00%> (ø)
nf_core/modules/modules_repo.py	82.85% <57.14%> (-1.33%)	⬇️
nf_core/modules/modules_json.py	73.37% <78.57%> (+0.09%)	⬆️
nf_core/__main__.py	52.67% <100.00%> (+0.01%)	⬆️
nf_core/modules/bump_versions.py	63.69% <100.00%> (ø)
nf_core/modules/install.py	69.56% <100.00%> (-2.81%)	⬇️
nf_core/modules/lint/__init__.py	82.47% <100.00%> (ø)
nf_core/modules/list.py	71.23% <100.00%> (ø)
nf_core/modules/modules_command.py	83.78% <100.00%> (ø)
nf_core/modules/patch.py	80.70% <100.00%> (ø)
... and 1 more

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[mashehu]

just one tiny thing

[mirpedrol]

@nf-core-bot fix linting