Merge branch 'feature/pre-swiftlint-cleanup' of https://github.com/mloit/web3swift into feature/pre-swiftlint-cleanup

* 'feature/pre-swiftlint-cleanup' of https://github.com/mloit/web3swift: (24 commits)
  removed unnecessary trailing comment
  removed missed commented import
  Removed empty file committed in 2018 and never used
  removed commented code blocks that are identical to the actual code
  removed leading and trailing spaces within parenthesis
  removed old commented code
  removed old commented code
  removed old commented code from 2019
  removed old commented code from 2018
  removed code that has sat commented out since 2018
  Removed unnecessary commented code
  Restore Quick Help friendly style comments -- some comments previously using the wrong style were promoted
  Basic code cleanup of Web3/*.swift -- remove trailing whitespace -- limit vertical whitespace -- remove unnecessary commented out imports -- remove duplicate imports -- remove trailing semicolons -- minor code style cleanup *** NO FUNCTIONAL CHANGES ***
  Basic code cleanup of Utils/ENS/*.swift -- remove trailing whitespace -- limit vertical whitespace -- remove unnecessary commented out imports -- remove duplicate imports -- remove trailing semicolons -- minor code style cleanup *** NO FUNCTIONAL CHANGES ***
  Basic code cleanup of Utils/EIP/*.swift and Utils/Hooks/*.swift -- remove trailing whitespace -- limit vertical whitespace -- remove unnecessary commented out imports -- remove duplicate imports -- remove trailing semicolons -- minor code style cleanup *** NO FUNCTIONAL CHANGES ***
  Basic code cleanup of SwiftRLP/*.swift and Transaction/*.swift -- remove trailing whitespace -- limit vertical whitespace -- remove unnecessary commented out imports -- remove duplicate imports -- remove trailing semicolons -- minor code style cleanup *** NO FUNCTIONAL CHANGES ***
  Basic code cleanup of Tokens/*/*.swift -- remove trailing whitespace -- limit vertical whitespace -- remove unnecessary commented out imports -- remove duplicate imports -- remove trailing semicolons -- minor code style cleanup *** NO FUNCTIONAL CHANGES ***
  Basic code cleanup of Promises/*.swift -- remove trailing whitespace -- limit vertical whitespace -- remove unnecessary commented out imports -- remove duplicate imports -- remove trailing semicolons -- minor code style cleanup *** NO FUNCTIONAL CHANGES ***
  Basic code cleanup of KeystoreManager/*.swift -- remove trailing whitespace -- limit vertical whitespace -- remove unnecessary commented out imports -- remove duplicate imports -- remove trailing semicolons -- minor code style cleanup *** NO FUNCTIONAL CHANGES ***
  Basic code cleanup of EthereumAddress/*.swift and HookedFunctions/*.swift -- remove trailing whitespace -- limit vertical whitespace -- remove unnecessary commented out imports -- remove duplicate imports -- remove trailing semicolons -- minor code style cleanup *** NO FUNCTIONAL CHANGES ***
  ...

Author: mloit