Revert "add a .clang-format file (#9154)" (#9172)

I thought git would be smart enough to understand all the whitespace changes but even with all the flags I know to make it ignore theses it still blows up if there are identical changes on both sides.

I have a solution but it require creating a new commit at the merge base for each conflicting PR and merging it into develop.

I don't think blowing up all PRs is worth for now, maybe if we can coordinate this for V3 let's say.

This reverts commit 0d11331d18.

src/input/SerialKeyboardImpl.h

@@ -9,10 +9,11 @@
  *      to your device as you wish, but you always need to have separate event
  *      handlers, thus you need to have a RotaryEncoderInterrupt implementation.
  */
-class SerialKeyboardImpl : public SerialKeyboard {
-public:
-  SerialKeyboardImpl();
-  void init();
+class SerialKeyboardImpl : public SerialKeyboard
+{
+  public:
+    SerialKeyboardImpl();
+    void init();
 };
 
 extern SerialKeyboardImpl *aSerialKeyboardImpl;