diff --git a/scripts/check_v2.c b/scripts/check_v2.c
deleted file mode 100644
index 1827fa10fa30..000000000000
--- a/scripts/check_v2.c
+++ /dev/null
@@ -1,174 +0,0 @@
-//
-// Created by Thom on 2019/3/8.
-//
-
-// Credits: https://github.com/brevent/genuine/blob/master/src/main/jni/apk-sign-v2.c
-#include <fcntl.h>
-#include <unistd.h>
-#include <stdbool.h>
-#include <stdint.h>
-
-#define MAIN
-
-#ifdef MAIN
-#include <stdio.h>
-#else
-
-#include "common.h"
-#include "openat.h"
-
-#endif
-
-static bool isApkSigBlock42(const char *buffer) {
-    // APK Sig Block 42
-    return *buffer == 'A'
-           && *++buffer == 'P'
-           && *++buffer == 'K'
-           && *++buffer == ' '
-           && *++buffer == 'S'
-           && *++buffer == 'i'
-           && *++buffer == 'g'
-           && *++buffer == ' '
-           && *++buffer == 'B'
-           && *++buffer == 'l'
-           && *++buffer == 'o'
-           && *++buffer == 'c'
-           && *++buffer == 'k'
-           && *++buffer == ' '
-           && *++buffer == '4'
-           && *++buffer == '2';
-}
-
-int checkSignature(const char *path) {
-    unsigned char buffer[0x11] = {0};
-    uint32_t size4;
-    uint64_t size8, size_of_block;
-
-#ifdef DEBUG
-    LOGI("check signature for %s", path);
-#endif
-
-    int sign = -1;
-    int fd = (int) openat(AT_FDCWD, path, O_RDONLY);
-#ifdef DEBUG_OPENAT
-    LOGI("openat %s returns %d", path, fd);
-#endif
-    if (fd < 0) {
-        return sign;
-    }
-
-    sign = 1;
-    // https://en.wikipedia.org/wiki/Zip_(file_format)#End_of_central_directory_record_(EOCD)
-    for (int i = 0;; ++i) {
-        unsigned short n;
-        lseek(fd, -i - 2, SEEK_END);
-        read(fd, &n, 2);
-        if (n == i) {
-            lseek(fd, -22, SEEK_CUR);
-            read(fd, &size4, 4);
-            if ((size4 ^ 0xcafebabeu) == 0xccfbf1eeu) {
-#ifdef MAIN
-                if (i > 0) {
-                    printf("warning: comment length is %d\n", i);
-                }
-#endif
-                break;
-            }
-        }
-        if (i == 0xffff) {
-#ifdef MAIN
-            printf("error: cannot find eocd\n");
-#endif
-            goto clean;
-        }
-    }
-
-    lseek(fd, 12, SEEK_CUR);
-    // offset
-    read(fd, &size4, 0x4);
-    lseek(fd, (off_t) (size4 - 0x18), SEEK_SET);
-
-    read(fd, &size8, 0x8);
-    read(fd, buffer, 0x10);
-    if (!isApkSigBlock42((char *) buffer)) {
-        goto clean;
-    }
-
-    lseek(fd, (off_t) (size4 - (size8 + 0x8)), SEEK_SET);
-    read(fd, &size_of_block, 0x8);
-    if (size_of_block != size8) {
-        goto clean;
-    }
-
-    for (;;) {
-        uint32_t id;
-        uint32_t offset;
-        read(fd, &size8, 0x8); // sequence length
-        if (size8 == size_of_block) {
-            break;
-        }
-        read(fd, &id, 0x4); // id
-        offset = 4;
-#ifdef MAIN
-        // printf("id: 0x%08x\n", id);
-#endif
-        if ((id ^ 0xdeadbeefu) == 0xafa439f5u || (id ^ 0xdeadbeefu) == 0x2efed62f) {
-            read(fd, &size4, 0x4); // signer-sequence length
-            read(fd, &size4, 0x4); // signer length
-            read(fd, &size4, 0x4); // signed data length
-            offset += 0x4 * 3;
-
-            read(fd, &size4, 0x4); // digests-sequence length
-            lseek(fd, (off_t) (size4), SEEK_CUR);// skip digests
-            offset += 0x4 + size4;
-
-            read(fd, &size4, 0x4); // certificates length
-            read(fd, &size4, 0x4); // certificate length
-            offset += 0x4 * 2;
-#ifdef MAIN
-            int hash = 1;
-            signed char c;
-            for (unsigned i = 0; i < size4; ++i) {
-                read(fd, &c, 0x1);
-                hash = 31 * hash + c;
-            }
-            offset += size4;
-            // printf("    size: 0x%04x, hash: 0x%08x\n", size4, ((unsigned) hash) ^ 0x14131211u);
-            printf("0x%04x 0x%08x\n", size4, ((unsigned) hash) ^ 0x14131211u);
-#else
-#if defined(GENUINE_SIZE) && defined(GENUINE_HASH)
-            if (size4 == GENUINE_SIZE) {
-                int hash = 1;
-                signed char c;
-                for (unsigned i = 0; i < size4; ++i) {
-                    read(fd, &c, 0x1);
-                    hash = 31 * hash + c;
-                }
-                offset += size4;
-                if ((((unsigned) hash) ^ 0x14131211u) == GENUINE_HASH) {
-                    sign = 0;
-                    break;
-                }
-            }
-#else
-            sign = 0;
-            break;
-#endif
-#endif
-        }
-        lseek(fd, (off_t) (size8 - offset), SEEK_CUR);
-    }
-
-clean:
-    close(fd);
-
-    return sign;
-}
-
-#ifdef MAIN
-int main(int argc, char **argv) {
-    if (argc > 1) {
-        checkSignature(argv[1]);
-    }
-}
-#endif