cleanup: remove dead code in Api/Process.hpp, remove redundant logtest program

kernel/src/Api/Process.hpp

@@ -230,15 +230,6 @@ namespace montauk::abi {
         char resolved[256];
         if (!ResolveProcessPath(path, resolved, sizeof(resolved))) return -1;
 
-        bool isDriveRoot = false;
-        {
-            int prefixLen = 0;
-            if (ParseDrivePrefix(resolved, &prefixLen) >= 0 &&
-                resolved[prefixLen] == '/' && resolved[prefixLen + 1] == '\0') {
-                isDriveRoot = true;
-            }
-        }
-
         // ReadDir doubles as the directory-existence probe: it fails
         // for nonexistent paths and for regular files (directories are
         // not openable as files anymore, so the old open-based check