don't pick up clang-format is present

Index: libraries/discordrpc/CMakeLists.txt
--- libraries/discordrpc/CMakeLists.txt.orig
+++ libraries/discordrpc/CMakeLists.txt
@@ -10,7 +10,8 @@ file(GLOB_RECURSE ALL_SOURCE_FILES
 )
 
 # Set CLANG_FORMAT_SUFFIX if you are using custom clang-format, e.g. clang-format-5.0
-find_program(CLANG_FORMAT_CMD clang-format${CLANG_FORMAT_SUFFIX})
+#find_program(CLANG_FORMAT_CMD clang-format${CLANG_FORMAT_SUFFIX})
+set(CLANG_FORMAT_CMD, FALSE)
 
 if (CLANG_FORMAT_CMD)
     add_custom_target(
