T3216

Depends on D14322

All component dependencies on the previous alias caching mechanism have now been deprecated. This diff removes the remaining un-used alias caching logic and unit tests.

• grep -r aliasCache src/
• grep -r getAliasesFromLocalForage src/
• npm test
• set alias flag to true in Ticker.js
• npm start
• open an existing wallet with the previous aliasCache in localForage and ensure no caching errors in the console log (simulating the majority of current users)
• delete cashtabCache in localForage, reload Cashtab and note the cashtabCache successfully updated message in the console log, along with no sign of aliasCache object in cashtabCache
• verify tokenInfoById in cashtabCache is correctly populated with tokens held by the wallet
• create a new wallet, observe no caching errors in console log and no aliasCache object in cashtabCache
• import a wallet, observe no caching errors in console log and correct cashtabCache structure
• set the alias flag set to false in Ticker.js and reload Cashtab and ensure no caching errors in console log