fix style

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/GilNode.java

@@ -42,7 +42,6 @@
 package com.oracle.graal.python.runtime;
 
 import com.oracle.graal.python.PythonLanguage;
-import com.oracle.graal.python.runtime.PythonContext.PythonThreadState;
 import com.oracle.truffle.api.CompilerDirectives;
 import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;