Remove unused step.

Author: cvacalares

src/step_definitions/importSteps.js

@@ -363,8 +363,4 @@ When("user uploads Genotype Samples {string} file", async function (file) {
     'input[type="file"]',
     path.resolve(experimentsFolder, args1)
   );
-});
-
-Then('user can see Import file extension supported are {string}', async function (s) {
-  await importPage.assert.attributeEquals("@fileSelector", "accept", s);
-})
+});