Remove vendored usvfs and Windows-only usvfs code paths

The Linux port uses its own in-process FUSE VFS (FuseConnector), so
usvfs was dead weight: libs/usvfs/ was never built, usvfsconnector.cpp
was explicitly REMOVE_ITEM'd from the source list, and every call site
was already guarded by #ifdef _WIN32 with a working Linux branch (the
Windows build is also broken on this branch, since FUSE3 is a hard
find_package dependency).

- Drop libs/usvfs/ and src/src/usvfsconnector.{cpp,h}
- Collapse #ifdef _WIN32 / usvfs include branches in organizercore,
  mainwindow, settings, util, spawn
- Remove getUsvfsVersionString() and the "usvfs: ..." log field
- Remove vfs32/64DLLName APPPARAMs (nothing reads them)
- Relabel About dialog "usvfs:" row to "VFS: FUSE 3"

1 files changed, 0 insertions, 29 deletions

diff --git a/libs/usvfs/test/gtest_utils/gtest_utils.h b/libs/usvfs/test/gtest_utils/gtest_utils.h
deleted file mode 100644
index 1dba70c..0000000
--- a/libs/usvfs/test/gtest_utils/gtest_utils.h
+++ /dev/null
@@ -1,29 +0,0 @@
-#pragma once
-
-// this file is shared by both usvfs_global_test and usvfs_global_test_runner
-//
-
-#include <filesystem>
-
-#include <gtest/gtest.h>
-
-::testing::AssertionResult AssertDirectoryEquals(const std::filesystem::path& expected,
-                                                 const std::filesystem::path& actual,
-                                                 bool content = true);
-
-::testing::AssertionResult AssertContentEquals(std::string_view expected,
-                                               const std::filesystem::path& path,
-                                               bool trim = true);
-
-// macro to assert that the contents of two directories are identical - directories are
-// compared recursively and file contents are compared (excluding extra spaces or lines
-// in file)
-//
-#define ASSERT_DIRECTORY_EQ(Expected, Actual)                                          \
-  ASSERT_TRUE(AssertDirectoryEquals(Expected, Actual))
-
-// macro to assert that the contents of two files are identical (excluding extra space
-// or lines in file)
-//
-#define ASSERT_CONTENT_EQ(Expected, Path)                                              \
-  ASSERT_TRUE(AssertContentEquals(Expected, Path))