old_contents: var gulp = require('gulp'),
      del = require('del'),
      cache = require('gulp-cached'),
      projectConfig = require('../../projectConfig'),
      pathsToDel = [
          './dev/',
          './.tmpTemplater/',
          './.tmpPreproc/'
      ];
  
      if (!projectConfig.useBuildVersioning) {
          pathsToDel.push('./builds/build/');
      }
  
  // Clean dev directory and cache
  module.exports = function(buildOptions) {
  
      return gulp.task('clean', function(cb) {
          delete cache.caches[
                  'linting', 'move-assets', 'move-content-img', 'move-plugins-img',
                  'move-fonts', 'move-svg', 'raster-svg', 'separate-js'
              ];
  
          del(pathsToDel, cb);
      });
  };   
new_contents: var gulp = require('gulp'),
      del = require('del'),
      projectConfig = require('../../projectConfig'),
      pathsToDel = [
          './dev/',
          './.tmpTemplater/',
          './.tmpPreproc/'
      ];
  
      if (!projectConfig.useBuildVersioning) {
          pathsToDel.push('./builds/build/');
      }
  
  // Clean dev directory and cache
  module.exports = function(buildOptions) {
  
      return gulp.task('clean', function(cb) {
          del(pathsToDel, cb);
      });
  };   
subject: remove clean cache