(Refactor) some variable declarations were be avoided. Readability and gas costs were improved

[Janther]

• What is it? (leave one option)

  • (Refactor) of existing code (no functionality change)

• What feature was missing?

Cleaning up the code before having it in production.

• How does this pull request solve it (in broad terms)?

Refactor of a decreasing for statement. Removal of a variable declaration that was only used once in unregisterAddress().

• Quick checklist

  • [X] npm run lint shows no errors
  • [X] docs were updated where necessary OR they don't need to be updated
  • [X] tests were updated where necessary OR they don't need to be updated

• Additional information

Also, some standardization in some statements was performed.

[coveralls]

Pull Request Test Coverage Report for Build 369

• 4 of 11 (36.36%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.05%) to 74.301%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
blockchain/contracts/ProofOfPhysicalAddress.sol	4	11	36.36%
<!--	Total:	4	11	36.36%	-->

Files with Coverage Reduction	New Missed Lines	%
blockchain/contracts/ProofOfPhysicalAddress.sol	1	47.03%
<!--	Total:	1		-->

Totals
Change from base Build 366:	0.05%
Covered Lines:	875
Relevant Lines:	1128

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💛 - Coveralls