Revert "Improved support for projects located on Windows network drives // Issue #3417"

This reverts commit a0c959be28.

platformio/package/manager/_symlink.py

@@ -40,7 +40,7 @@ class PackageManagerSymlinkMixin:
         pkg_dir, spec = self.resolve_symlink(path)
         if not pkg_dir:
             return None
-        pkg = PackageItem(os.path.abspath(pkg_dir))
+        pkg = PackageItem(os.path.realpath(pkg_dir))
         if not pkg.metadata:
             pkg.metadata = self.build_metadata(pkg.path, spec)
         return pkg

platformio/package/meta.py

@@ -482,7 +482,7 @@ class PackageItem:
 
     def __eq__(self, other):
         conds = [
-            os.path.abspath(self.path) == os.path.abspath(other.path)
+            os.path.realpath(self.path) == os.path.realpath(other.path)
             if self.path and other.path
             else self.path == other.path,
             self.metadata == other.metadata,
@@ -490,7 +490,7 @@ class PackageItem:
         return all(conds)
 
     def __hash__(self):
-        return hash(os.path.abspath(self.path))
+        return hash(os.path.realpath(self.path))
 
     def exists(self):
         return os.path.isdir(self.path)