rp2: Remove build patch for Findpioasm.cmake.

This patch was added in 3fa77bd to fix the
GCC 15 build issue raspberrypi/pico-sdk#2448.

The patch is no longer needed with SDK 2.2.0.

Signed-off-by: Peter Harper <peter.harper@raspberrypi.com>

Author: peterharperuk

ports/rp2/CMakeLists.txt

@@ -84,9 +84,6 @@ endif()
 list(APPEND GIT_SUBMODULES lib/mbedtls)
 list(APPEND GIT_SUBMODULES lib/tinyusb)
 
-# Workaround for pico-sdk host toolchain issue, see directory for details
-list(APPEND CMAKE_MODULE_PATH "${MICROPY_PORT_DIR}/tools_patch")
-
 # Include component cmake fragments
 include(${MICROPY_DIR}/py/py.cmake)
 include(${MICROPY_DIR}/extmod/extmod.cmake)