Remove unused imports/deps from SoyFileParser.
GITHUB_BREAKING_CHANGES=none
@@ -132,7 +132,6 @@ import com.google.template.soy.soytree.WhitespaceMode;
import com.google.template.soy.soytree.defn.TemplateHeaderVarDefn;
import com.google.template.soy.soytree.defn.TemplateParam;
import com.google.template.soy.soytree.defn.TemplateStateVar;
-import com.google.template.soy.types.NullType;
import com.google.template.soy.types.ast.GenericTypeNode;
import com.google.template.soy.types.ast.NamedTypeNode;
import com.google.template.soy.types.ast.RecordTypeNode;
