message: style: removes unused imports
diff: -import * as fs from 'fs';
  -import { cwd } from 'process';
  import * as ts from 'typescript';
  import { logOnce } from './logger';
  -import { CodeSourceMapPair, TsJestConfig } from './jest-types';
  +import { CodeSourceMapPair } from './jest-types';
  // Takes the typescript code and by whatever method configured, makes it into javascript code.
  export function transpileTypescript(
  