Fix style.

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/common/SequenceNodes.java

@@ -47,9 +47,6 @@
 import com.oracle.graal.python.nodes.PGuards;
 import com.oracle.graal.python.nodes.PNodeWithContext;
 import com.oracle.graal.python.runtime.sequence.PSequence;
-import com.oracle.truffle.api.dsl.Cached;
-import com.oracle.truffle.api.dsl.ImportStatic;
-import com.oracle.truffle.api.dsl.Specialization;
 import com.oracle.graal.python.runtime.sequence.storage.SequenceStorage;
 import com.oracle.truffle.api.CompilerDirectives;
 import com.oracle.truffle.api.dsl.Cached;