backups: remove periodic dumping of heap info

this has not been as useful as I expected

src/scripts/backupupload.js

@@ -11,8 +11,7 @@ const backuptask = require('../backuptask.js'),
     database = require('../database.js'),
     debug = require('debug')('box:backupupload'),
     safe = require('safetydance'),
-    settings = require('../settings.js'),
-    v8 = require('v8');
+    settings = require('../settings.js');
 
 // Main process starts here
 const remotePath = process.argv[2];
@@ -43,35 +42,14 @@ function throttledProgressCallback(msecs) {
     };
 }
 
-// https://github.com/josefzamrzla/gc-heap-stats#readme
-// https://stackoverflow.com/questions/41541843/nodejs-v8-getheapstatistics-method
-function dumpMemoryInfo() {
-    const mu = process.memoryUsage();
-    const hs = v8.getHeapStatistics();
-
-    function h(bytes) { // human readable
-        const i = Math.floor(Math.log(bytes) / Math.log(1024)),
-            sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
-
-        return (bytes / Math.pow(1024, i)).toFixed(2) * 1 + '' + sizes[i];
-    }
-
-    debug(`process: rss=${h(mu.rss)} heapUsed=${h(mu.heapUsed)} heapTotal=${h(mu.heapTotal)} external=${h(mu.external)}`
-        + ` v8 heap: used=${h(hs.used_heap_size)} total=${h(hs.total_heap_size)} max=${h(hs.heap_size_limit)}`);
-}
-
 (async function main() {
     await database.initialize();
     await settings.initCache();
 
-    dumpMemoryInfo();
-    const timerId = setInterval(dumpMemoryInfo, 180 * 1000);
-
     const [uploadError] = await safe(backuptask.upload(remotePath, format, dataLayoutString, throttledProgressCallback(5000)));
     debug('upload completed. error: ', uploadError);
 
     process.send({ result: uploadError ? uploadError.message : '' });
-    clearInterval(timerId);
 
     // https://nodejs.org/api/process.html are exit codes used by node. apps.js uses the value below
     // to check apptask crashes