Remove useless 'zemu' tests approve_dai (already exists in 'ragger')

tests/zemu/snapshots/nanos_approve_dai_tokens/00009.png

@@ -1 +0,0 @@
-00007.png

tests/zemu/snapshots/nanox_approve_dai_tokens/00007.png

@@ -1 +0,0 @@
-00005.png

tests/zemu/src/approve.test.js

@@ -1,25 +0,0 @@
-import "core-js/stable";
-import "regenerator-runtime/runtime";
-import { waitForAppScreen, zemu, nano_models } from './test.fixture';
-
-nano_models.forEach(function(model) {
-    test('[Nano ' + model.letter + '] Approve DAI tokens', zemu(model, async (sim, eth) => {
-
-      const tx = eth.signTransaction(
-        "44'/60'/1'/0/0",
-        'F869468506A8B15E0082EBEB946B175474E89094C44DA98B954EEDEAC495271D0F80B844095EA7B30000000000000000000000007D2768DE32B0B80B7A3454C06BDAC94A69DDC7A9FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF018080',
-      );
-
-      let clicks;
-      if (model.letter === 'S') clicks = 8;
-      else clicks = 6;
-      await waitForAppScreen(sim);
-      await sim.navigateAndCompareSnapshots('.', model.name + '_approve_dai_tokens', [clicks, -1, 0]);
-
-      await expect(tx).resolves.toEqual({
-        "r": "92243511396b65a4faa735a5472ea99b3ce0f7f2338eab426206730bc0ddc57f",
-        "s": "161bc0f861064d840de4f4304cfd19a571017e62df7d8f70cf605c0f025593b6",
-        "v": "25",
-      });
-    }));
-});