Remove unused code coverage command (microsoft#45684)

Author: andrewbranch

Gulpfile.js

@@ -437,10 +437,6 @@ task("watch-local").flags = {
     "   --built": "Compile using the built version of the compiler."
 };
 
-const generateCodeCoverage = () => exec("istanbul", ["cover", "node_modules/mocha/bin/_mocha", "--", "-R", "min", "-t", "" + cmdLineOptions.testTimeout, "built/local/run.js"]);
-task("generate-code-coverage", series(preBuild, buildTests, generateCodeCoverage));
-task("generate-code-coverage").description = "Generates code coverage data via istanbul";
-
 const preTest = parallel(buildTsc, buildTests, buildServices, buildLssl);
 preTest.displayName = "preTest";
 

package-lock.json

@@ -79,7 +79,6 @@
         "gulp-newer": "latest",
         "gulp-rename": "latest",
         "gulp-sourcemaps": "latest",
-        "istanbul": "latest",
         "merge2": "latest",
         "minimist": "latest",
         "mkdirp": "latest",