diff --git a/examples/platforms/efr32/efr32mg1/efr32mg1.cmake b/examples/platforms/efr32/efr32mg1/efr32mg1.cmake
deleted file mode 100644
index e15da5a3f..000000000
--- a/examples/platforms/efr32/efr32mg1/efr32mg1.cmake
+++ /dev/null
@@ -1,89 +0,0 @@
-#
-#  Copyright (c) 2021, The OpenThread Authors.
-#  All rights reserved.
-#
-#  Redistribution and use in source and binary forms, with or without
-#  modification, are permitted provided that the following conditions are met:
-#  1. Redistributions of source code must retain the above copyright
-#     notice, this list of conditions and the following disclaimer.
-#  2. Redistributions in binary form must reproduce the above copyright
-#     notice, this list of conditions and the following disclaimer in the
-#     documentation and/or other materials provided with the distribution.
-#  3. Neither the name of the copyright holder nor the
-#     names of its contributors may be used to endorse or promote products
-#     derived from this software without specific prior written permission.
-#
-#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-#  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
-#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-#  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-#  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-#  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-#  POSSIBILITY OF SUCH DAMAGE.
-#
-
-# ==============================================================================
-# Verify board is supported for platform
-# ==============================================================================
-if(BOARD_LOWERCASE STREQUAL "brd4151a")
-    set(MCU "EFR32MG1P232F256GM48")
-else()
-    message(FATAL_ERROR "
-    BOARD=${BOARD} not supported.
-
-    Please provide a value for BOARD variable e.g BOARD=brd4151a.
-    Currently supported:
-    - brd4151a
-    ")
-endif()
-
-list(APPEND OT_PLATFORM_DEFINES "${MCU}")
-set(OT_PLATFORM_DEFINES ${OT_PLATFORM_DEFINES} PARENT_SCOPE)
-
-# ==============================================================================
-# Platform library
-# ==============================================================================
-set(OT_PLATFORM_LIB "openthread-efr32mg1")
-set(OT_PLATFORM_LIB ${OT_PLATFORM_LIB} PARENT_SCOPE)
-
-set(LD_FILE "${CMAKE_CURRENT_SOURCE_DIR}/efr32mg1/efr32mg1.ld")
-
-add_library(openthread-efr32mg1
-    ${EFR32_COMMON_SOURCES}
-    $<TARGET_OBJECTS:openthread-platform-utils>
-)
-
-target_link_libraries(openthread-efr32mg1
-    PUBLIC
-        ${EFR32_COMMON_3RD_LIBS}
-        silabs-libnvm3_CM4_gcc
-        silabs-efr32mg1-sdk
-        -T${LD_FILE}
-        -Wl,--gc-sections
-        -Wl,-Map=$<TARGET_PROPERTY:NAME>.map
-    PRIVATE
-        ot-config
-)
-
-target_compile_definitions(openthread-efr32mg1
-    PUBLIC
-        ${OT_PLATFORM_DEFINES}
-)
-
-target_compile_options(openthread-efr32mg1
-    PRIVATE
-        ${EFR32_CFLAGS}
-)
-
-target_include_directories(openthread-efr32mg1
-    PUBLIC
-        ${EFR32_INCLUDES}
-    PRIVATE
-        ${SILABS_EFR32MG1X_INCLUDES}
-        ${OT_PUBLIC_INCLUDES}
-)
-