improve code

Signed-off-by: Kevin Cui <bh@bugs.cc>

Author: BlackHole1

src/operator/get-range.ts

@@ -5,7 +5,7 @@ import { Buffer } from "node:buffer";
 import { buildFilter } from "../builder/filter";
 import { OTS_API_NAME } from "../const";
 import { builder } from "../pb/builder";
-import { decodePlainBuffer, encodePlainBuffer, VariantType } from "../plainbuffer";
+import { decodePlainBuffer, encodePlainBuffer } from "../plainbuffer";
 import { fixPlainBufferCellType } from "../utils";
 
 export const ProtoGetRangeRequest = builder.lookupType("ots.GetRangeRequest");

src/plainbuffer.ts

@@ -1,5 +1,3 @@
-import { INF_MAX, INF_MIN } from "./const";
-
 // FROM: https://github.com/waynecraig/plainbuffer
 const HEADER = 0x75;