Remove libcrashreporter-qt more thoroughly

.gitmodules

-[submodule "thirdparty/libcrashreporter-qt"]
-	path = thirdparty/libcrashreporter-qt
-	url = https://github.com/dschmidt/libcrashreporter-qt

thirdparty/CMakeLists.txt

-if( CMAKE_CXX_COMPILER_ID MATCHES "Clang" )
-    # Suppress warnings entirely; not interesting in third-party code
-    set( CMAKE_CXX_FLAGS                "${CMAKE_CXX_FLAGS} -w" )
-endif()
-
-if( WITH_CRASHREPORTER )
-    macro( qt_wrap_ui )
-        qt5_wrap_ui( ${ARGN} )
-    endmacro()
-    add_subdirectory( libcrashreporter-qt )
-endif()

libcrashreporter-qt @ 61dc3963

-Subproject commit 61dc3963c2b59894e7d3f3bd758c43b59665054a