src: remove unused isolate variable
Currently the following compiler warning is generated:
../src/node_task_queue.cc:93:12: warning:
unused variable 'isolate' [-Wunused-variable]
Isolate* isolate = env->isolate();
^
1 warning generated.
This commit removes the unused variable.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
commit message follows commit guidelines