chore(vhd-lib): remove unused _constant-stream.js

Since 43822d3667

packages/vhd-lib/package.json

@@ -25,7 +25,6 @@
     "@xen-orchestra/log": "^0.2.0",
     "async-iterator-to-stream": "^1.0.2",
     "core-js": "^3.0.0",
-    "from2": "^2.3.0",
     "fs-extra": "^8.0.1",
     "limit-concurrency-decorator": "^0.4.0",
     "lodash": "^4.17.4",

packages/vhd-lib/src/_constant-stream.js

@@ -1,42 +0,0 @@
-import from2 from 'from2'
-
-const constantStream = (data, n = 1) => {
-  if (!Buffer.isBuffer(data)) {
-    data = Buffer.from(data)
-  }
-
-  const { length } = data
-
-  if (!length) {
-    throw new Error('data should not be empty')
-  }
-
-  n *= length
-  let currentLength = length
-
-  return from2((size, next) => {
-    if (n <= 0) {
-      return next(null, null)
-    }
-
-    if (n < size) {
-      size = n
-    }
-
-    if (size < currentLength) {
-      const m = Math.floor(size / length) * length || length
-      n -= m
-      return next(null, data.slice(0, m))
-    }
-
-    // if more than twice the data length is requested, repeat the data
-    if (size > currentLength * 2) {
-      currentLength = Math.floor(size / length) * length
-      data = Buffer.alloc(currentLength, data)
-    }
-
-    n -= currentLength
-    return next(null, data)
-  })
-}
-export { constantStream as default }