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/kbMatrixImpl.cpp

@@ -7,13 +7,14 @@ KbMatrixImpl *kbMatrixImpl;
 
 KbMatrixImpl::KbMatrixImpl() : KbMatrixBase("matrixKB") {}
 
-void KbMatrixImpl::init() {
-  if (!INPUTBROKER_MATRIX_TYPE) {
-    disable();
-    return;
-  }
+void KbMatrixImpl::init()
+{
+    if (!INPUTBROKER_MATRIX_TYPE) {
+        disable();
+        return;
+    }
 
-  inputBroker->registerSource(this);
+    inputBroker->registerSource(this);
 }
 
 #endif // INPUTBROKER_MATRIX_TYPE