Meta+DevTools: Make clang-format-10 clean

Author: https://github.com/BenWiederhake
Commit: 25488ddcad
Pull-request: https://github.com/SerenityOS/serenity/pull/3541
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/linusg

DevTools/HackStudio/CMakeLists.txt

@@ -26,7 +26,6 @@ set(SOURCES
     Project.cpp
     ProjectFile.cpp
     TerminalWrapper.cpp
-    Tool.cpp
     WidgetTool.cpp
     WidgetTreeModel.cpp
     main.cpp