remove .js from import

test/mocks/acquirerPlugin1.js

@@ -1,4 +1,4 @@
-import Plugin from '../../src/core/Plugin.js'
+import Plugin from '../../src/core/Plugin'
 
 export default class TestSelector1 extends Plugin {
   constructor (uppy, opts) {

test/mocks/acquirerPlugin2.js

@@ -1,4 +1,4 @@
-import Plugin from '../../src/core/Plugin.js'
+import Plugin from '../../src/core/Plugin'
 
 export default class TestSelector2 extends Plugin {
   constructor (uppy, opts) {

test/mocks/invalidPluginWithoutId.js

@@ -1,4 +1,4 @@
-import Plugin from '../../src/core/Plugin.js'
+import Plugin from '../../src/core/Plugin'
 
 export default class InvalidPluginWithoutName extends Plugin {
   constructor (uppy, opts) {

test/mocks/invalidPluginWithoutType.js

@@ -1,4 +1,4 @@
-import Plugin from '../../src/core/Plugin.js'
+import Plugin from '../../src/core/Plugin'
 
 export default class InvalidPluginWithoutType extends Plugin {
   constructor (uppy, opts) {