Removed deprecated private "_js_deps" and "_js_exports" attributes from j2cl_library.
Removed deprecated private "_js_deps" and "_js_exports" attributes from j2cl_library.

"deps" and "exports" already handles both J2CL and JS deps.

PiperOrigin-RevId: 254449364

google/j2cl,google/j2cl,google/j2cl,google/j2cl,google/j2cl