Remove network upload

[umbynos]

Please check if the PR fulfills these requirements

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• Tests for the changes have been added (for bug fixes / features)

• What kind of change does this PR introduce?

remove Network Upload

• What is the current behavior?

The Network Upload is a functionality that has been implemented to support the Arduino Yun, since the board reached it's EOL stage we are removing the functionality.

• What is the new behavior?

The Arduino Yun is no more supported

• Does this PR introduce a breaking change?

Yes

• Other information:

[codecov-commenter]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (0fd774a) 19.93% compared to head (d401eca) 19.99%.

Files	Patch %	Lines
serial.go	0.00%	4 Missing ⚠️
serialport.go	0.00%	4 Missing ⚠️
conn.go	0.00%	1 Missing ⚠️
hub.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #878      +/-   ##
==========================================
+ Coverage   19.93%   19.99%   +0.05%     
==========================================
  Files          44       43       -1     
  Lines        3626     3366     -260     
==========================================
- Hits          723      673      -50     
+ Misses       2809     2601     -208     
+ Partials       94       92       -2     

Flag	Coverage Δ
unit	19.99% <0.00%> (+0.05%)	⬆️

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[rhpco]

LGTM!

[alessio-perugini]

✂️