CMake: don't force Monero submodule commit

CMakeLists.txt

@@ -33,7 +33,6 @@ if(DEBUG)
     set(CMAKE_VERBOSE_MAKEFILE ON)
 endif()
 
-set(MONERO_HEAD "23650c7aa97adb1a2e5e147c3c20bdd1236b5a67")
 set(BUILD_GUI_DEPS ON)
 option(ARCH "Target architecture" "native")
 set(BUILD_64 ON)
@@ -50,16 +49,6 @@ if(STATIC)
     set(Boost_USE_STATIC_RUNTIME ON)
 endif()
 
-find_package(Git)
-if(GIT_FOUND)
-    execute_process(COMMAND git rev-parse "HEAD" WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/monero OUTPUT_VARIABLE _MONERO_HEAD OUTPUT_STRIP_TRAILING_WHITESPACE)
-    if(NOT _MONERO_HEAD STREQUAL MONERO_HEAD)
-        message(FATAL_ERROR "[submodule] Monero HEAD was at ${_MONERO_HEAD} but should be at ${MONERO_HEAD}")
-    else()
-        message(STATUS "[submodule] Monero HEAD @ ${MONERO_HEAD}")
-    endif()
-endif()
-
 add_subdirectory(monero)
 set_property(TARGET wallet_merged PROPERTY FOLDER "monero")
 get_directory_property(ARCH_WIDTH DIRECTORY "monero" DEFINITION ARCH_WIDTH)