chore: Fix lint issues

Author: lqiu96

gax-java/gax-grpc/src/main/java/com/google/api/gax/grpc/nativeimage/GrpcNettyFeature.java

@@ -32,7 +32,6 @@
 
 import static com.google.api.gax.nativeimage.NativeImageUtils.registerClassForReflection;
 import static com.google.api.gax.nativeimage.NativeImageUtils.registerClassHierarchyForReflection;
-import static com.google.api.gax.nativeimage.NativeImageUtils.registerConstructorsForReflection;
 import static com.google.api.gax.nativeimage.NativeImageUtils.registerForReflectiveInstantiation;
 import static com.google.api.gax.nativeimage.NativeImageUtils.registerForUnsafeFieldAccess;