remove redundant merge script

merge-bin.py

@@ -1,48 +0,0 @@
-#!/usr/bin/python3
-
-# Adds PlatformIO post-processing to merge all the ESP flash images into a single image.
-
-import os
-
-Import("env", "projenv")
-
-board_config = env.BoardConfig()
-firmware_bin = "${BUILD_DIR}/${PROGNAME}.bin"
-merged_bin = os.environ.get("MERGED_BIN_PATH", "${BUILD_DIR}/${PROGNAME}-merged.bin")
-
-
-def merge_bin_action(source, target, env):
-    flash_images = [
-        *env.Flatten(env.get("FLASH_EXTRA_IMAGES", [])),
-        "$ESP32_APP_OFFSET",
-        source[0].get_abspath(),
-    ]
-    merge_cmd = " ".join(
-        [
-            '"$PYTHONEXE"',
-            '"$OBJCOPY"',
-            "--chip",
-            board_config.get("build.mcu", "esp32"),
-            "merge_bin",
-            "-o",
-            merged_bin,
-            "--flash_mode",
-            board_config.get("build.flash_mode", "dio"),
-            "--flash_freq",
-            "${__get_board_f_flash(__env__)}",
-            "--flash_size",
-            board_config.get("upload.flash_size", "4MB"),
-            *flash_images,
-        ]
-    )
-    env.Execute(merge_cmd)
-
-
-env.AddCustomTarget(
-    name="mergebin",
-    dependencies=firmware_bin,
-    actions=merge_bin_action,
-    title="Merge binary",
-    description="Build combined image",
-    always_build=True,
-)