removed unneeded @parcel/reporter-dev-server

[purplecabbage]

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

Merging #408 (70b0fa6) into master (1b7c2fe) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #408   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           39        39           
  Lines         1691      1690    -1     
  Branches       285       285           
=========================================
- Hits          1691      1690    -1     

Impacted Files	Coverage Δ
src/lib/run-dev.js	100.00% <ø> (ø)

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