diff --git a/boot/zephyr/CMakeLists.txt b/boot/zephyr/CMakeLists.txt
index c601afa67..aa1dbc7cd 100644
--- a/boot/zephyr/CMakeLists.txt
+++ b/boot/zephyr/CMakeLists.txt
@@ -90,12 +90,6 @@ if(DEFINED CONFIG_ENABLE_MGMT_PERUSER)
   endif()
 endif()
 
-if(NOT DEFINED CONFIG_FLASH_PAGE_LAYOUT)
-  zephyr_library_sources(
-    flash_map_legacy.c
-    )
-endif()
-
 if(DEFINED CONFIG_BOOT_SHARE_BACKEND_RETENTION)
   zephyr_library_sources(
     shared_data.c
diff --git a/boot/zephyr/flash_map_legacy.c b/boot/zephyr/flash_map_legacy.c
deleted file mode 100644
index 6a8e7ae3d..000000000
--- a/boot/zephyr/flash_map_legacy.c
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *  http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-/**
- * @file
- * @brief Legacy flash fallbacks
- *
- * This file contains hacks for flash drivers without page layout
- * support. They're hacks because they guess a page layout that may be
- * incorrect, but is likely to "work". Needless to say, such guesswork
- * is undesirable in trusted bootloader code.
- *
- * The behavior is:
- *
- * - If FLASH_AREA_IMAGE_SECTOR_SIZE is defined (this was used by
- *   older Zephyr ports), the image sectors have uniform sector sizes.
- *   We also assume that's the size of the scratch sectors.
- *
- * - Otherwise, we assume that the size of the entire scratch area is
- *   a least common multiple of all sector sizes, and use that as
- *   FLASH_AREA_IMAGE_SECTOR_SIZE.
- */
-
-#include "bootutil/bootutil_log.h"
-
-#include <flash_map_backend/flash_map_backend.h>
-#include <inttypes.h>
-#include <target.h>
-
-#warning "The flash driver lacks page layout support; falling back on hacks."
-
-#if !defined(FLASH_AREA_IMAGE_SECTOR_SIZE)
-#define FLASH_AREA_IMAGE_SECTOR_SIZE FLASH_AREA_IMAGE_SCRATCH_SIZE
-#endif
-
-BOOT_LOG_MODULE_DECLARE(mcuboot);
-
-/*
- * Lookup the sector map for a given flash area.  This should fill in
- * `ret` with all of the sectors in the area.  `*cnt` will be set to
- * the storage at `ret` and should be set to the final number of
- * sectors in this area.
- */
-int flash_area_get_sectors(int idx, uint32_t *cnt, struct flash_sector *ret)
-{
-    const struct flash_area *fa;
-    uint32_t max_cnt = *cnt;
-    uint32_t rem_len;
-    int rc = -1;
-
-    if (flash_area_open(idx, &fa))  {
-        goto out;
-    }
-
-    BOOT_LOG_DBG("area %d: offset=0x%x, length=0x%x", idx, fa->fa_off,
-                 fa->fa_size);
-
-    if (*cnt < 1) {
-        goto fa_close_out;
-    }
-
-    rem_len = fa->fa_size;
-    *cnt = 0;
-    while (rem_len > 0 && *cnt < max_cnt) {
-        if (rem_len < FLASH_AREA_IMAGE_SECTOR_SIZE) {
-            BOOT_LOG_ERR("area %d size 0x%x not divisible by sector size 0x%x",
-                         idx, fa->fa_size, FLASH_AREA_IMAGE_SECTOR_SIZE);
-            goto fa_close_out;
-        }
-
-        ret[*cnt].fs_off = FLASH_AREA_IMAGE_SECTOR_SIZE * (*cnt);
-        ret[*cnt].fs_size = FLASH_AREA_IMAGE_SECTOR_SIZE;
-        *cnt = *cnt + 1;
-        rem_len -= FLASH_AREA_IMAGE_SECTOR_SIZE;
-    }
-
-    if (*cnt >= max_cnt) {
-        BOOT_LOG_ERR("flash area %d sector count overflow", idx);
-        goto fa_close_out;
-    }
-
-    rc = 0;
-
-fa_close_out:
-    flash_area_close(fa);
-out:
-    return rc;
-}