Remove the parentheses from the judgment

Author: Terran

core/src/main/java/org/apache/calcite/sql/dialect/MssqlSqlDialect.java

@@ -172,7 +172,7 @@ public MssqlSqlDialect(Context context) {
       final SqlWriter.Frame frame = writer.startFunCall("CEILING");
       call.operand(0).unparse(writer, leftPrec, rightPrec);
       writer.endFunCall(frame);
-    } else if (call.getKind() == (SqlKind.SAFE_CAST)) {
+    } else if (call.getKind() == SqlKind.SAFE_CAST) {
       // TRY_CAST is supported but not SAFE_CAST in MS SQL
       final SqlWriter.Frame frame = writer.startFunCall("TRY_CAST");
       call.operand(0).unparse(writer, leftPrec, rightPrec);