Revert "Document Linux USB mount-option workaround for OSError after Ctrl-D (#229)"

index.html

@@ -338,17 +338,6 @@ <h1>Select Serial Device</h1>
                 <div class="step-content">
                     <h1>Select USB Host Folder</h1>
                     <p>Select the root folder of your device. This is typically the CIRCUITPY Drive on your computer unless you renamed it. If your device does not appear as a drive on your computer, it will need to have the USB Host functionality enabled.</p>
-                    <details id="linux-mount-notice" class="linux-mount-notice" hidden>
-                        <summary><strong>Linux:</strong> seeing <code>OSError: [Errno 5]</code> after <kbd>Ctrl</kbd>+<kbd>D</kbd>? Click for fix.</summary>
-                        <p>Your CIRCUITPY drive is mounted with asynchronous writes. Remount it with <code>sync</code>:</p>
-                        <pre><code>udisksctl unmount -b /dev/sdX1
-udisksctl mount -b /dev/sdX1 -o sync</code></pre>
-                        <p>Replace <code>sdX1</code> with the correct device. Find it with:</p>
-                        <pre><code>lsblk</code></pre>
-                        <p>or:</p>
-                        <pre><code>mount | grep CIRCUITPY</code></pre>
-                        <p>For a permanent fix, see <a href="https://github.com/circuitpython/web-editor/blob/main/docs/LINUX_USB_MOUNT.md" target="_blank" rel="noopener">Linux USB mount notes</a>.</p>
-                    </details>
                     <p>
                         <button class="purple-button hidden" id="useHostFolder"><span id="workingFolder"></span></button>
                         <button class="purple-button first-item" id="selectHostFolder">Select New Folder</button>

js/common/utilities.js

@@ -75,26 +75,6 @@ function isChromeOs() {
     return false;
 }
 
-// Test to see if browser is running on Linux (and is not Chrome OS or
-// Android, which can also report "Linux" in the legacy userAgent string).
-function isLinux() {
-    // Newer test on Chromium
-    if (navigator.userAgentData?.platform === "Linux") {
-        return true;
-    }
-    // Avoid false positives for Chrome OS and Android.
-    if (isChromeOs()) {
-        return false;
-    }
-    if (navigator.userAgent.includes("Android")) {
-        return false;
-    }
-    if (navigator.userAgent.includes("Linux")) {
-        return true;
-    }
-    return false;
-}
-
 // Parse out the url parameters from the current url
 function getUrlParams() {
     // This should look for and validate very specific values
@@ -187,7 +167,6 @@ export {
     isLocal,
     isMicrosoftWindows,
     isChromeOs,
-    isLinux,
     getUrlParams,
     getUrlParam,
     timeout,

js/workflows/usb.js

@@ -4,7 +4,7 @@ import {GenericModal, DeviceInfoModal} from '../common/dialogs.js';
 import {FileOps} from '@adafruit/circuitpython-repl-js'; // Use this to determine which FileTransferClient to load
 import {FileTransferClient as ReplFileTransferClient} from '../common/repl-file-transfer.js';
 import {FileTransferClient as FSAPIFileTransferClient} from '../common/fsapi-file-transfer.js';
-import { isChromeOs, isLinux, isMicrosoftWindows } from '../common/utilities.js';
+import { isChromeOs, isMicrosoftWindows } from '../common/utilities.js';
 
 let btnRequestSerialDevice, btnSelectHostFolder, btnUseHostFolder, lblWorkingfolder;
 
@@ -211,16 +211,6 @@ class USBWorkflow extends Workflow {
         btnUseHostFolder = modal.querySelector('#useHostFolder');
         lblWorkingfolder = modal.querySelector('#workingFolder');
 
-        // Show the Linux-only mount-option notice when relevant (#229).
-        // CIRCUITPY mounted without `sync` on Linux can produce
-        // "OSError: [Errno 5] Input/output error" on Ctrl-D after a save
-        // because Chromium's File System Access writes are deferred by the
-        // kernel writeback for up to ~30s.
-        const linuxNotice = modal.querySelector('#linux-mount-notice');
-        if (linuxNotice) {
-            linuxNotice.hidden = !isLinux();
-        }
-
         // Map the button states to the buttons
         this.connectButtons = {
             request: btnRequestSerialDevice,

sass/layout/_layout.scss

@@ -542,70 +542,3 @@
     }
 
 }
-
-// Inline notice shown in the USB connect dialog for Linux users (#229).
-.linux-mount-notice {
-    margin-top: 1rem;
-    padding: 0.5rem 1rem;
-    border-left: 4px solid #f0ad4e;
-    background-color: #fff8e1;
-    border-radius: 3px;
-    font-size: 0.95em;
-
-    summary {
-        cursor: pointer;
-        padding: 0.25rem 0;
-        list-style: none;
-        position: relative;
-        padding-left: 1.25rem;
-
-        &::-webkit-details-marker {
-            display: none;
-        }
-
-        &::before {
-            content: "\25B6"; // right-pointing triangle
-            position: absolute;
-            left: 0;
-            font-size: 0.8em;
-            transition: transform 150ms ease-in-out;
-            display: inline-block;
-        }
-    }
-
-    &[open] summary {
-        margin-bottom: 0.5rem;
-
-        &::before {
-            transform: rotate(90deg);
-        }
-    }
-
-    p {
-        margin: 0.25rem 0;
-    }
-
-    pre {
-        margin: 0.5rem 0;
-        padding: 0.5rem;
-        background-color: #2d2d2d;
-        color: #f1f1f1;
-        border-radius: 3px;
-        overflow-x: auto;
-        font-size: 0.9em;
-    }
-
-    code {
-        font-family: monospace;
-    }
-
-    kbd {
-        display: inline-block;
-        padding: 1px 4px;
-        font-family: monospace;
-        font-size: 0.9em;
-        background-color: #eee;
-        border: 1px solid #ccc;
-        border-radius: 3px;
-    }
-}