removal of old java desktop + workspace change in tauri (#5459)

# Description of Changes

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Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)
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## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

app/common/src/main/java/stirling/software/common/configuration/InstallationPathConfig.java

@@ -1,8 +1,6 @@
 package stirling.software.common.configuration;
 
 import java.io.File;
-import java.nio.file.Paths;
-import java.util.Locale;
 
 import lombok.extern.slf4j.Slf4j;
 
@@ -61,28 +59,6 @@ public class InstallationPathConfig {
     }
 
     private static String initializeBasePath() {
-        if (Boolean.parseBoolean(System.getProperty("STIRLING_PDF_DESKTOP_UI", "false"))) {
-            String os = System.getProperty("os.name").toLowerCase(Locale.ROOT);
-            if (os.contains("win")) {
-                return Paths.get(
-                                System.getenv("APPDATA"), // parent path
-                                "Stirling-PDF")
-                        + File.separator;
-            } else if (os.contains("mac")) {
-                return Paths.get(
-                                System.getProperty("user.home"),
-                                "Library",
-                                "Application Support",
-                                "Stirling-PDF")
-                        + File.separator;
-            } else {
-                return Paths.get(
-                                System.getProperty("user.home"), // parent path
-                                ".config",
-                                "Stirling-PDF")
-                        + File.separator;
-            }
-        }
         return "." + File.separator;
     }