cleanup: remove unneeded .gitkeep files after layout auto-creation

config/layouts/Main.cfg

@@ -0,0 +1,32 @@
+[layout]
+
+name="Main"
+saved_at="2026-05-21T09:03:37"
+
+[tiles]
+
+count=3
+
+[tile_0]
+
+id="system_monitor/cpu"
+col=0
+row=0
+w=1
+h=1
+
+[tile_1]
+
+id="system_monitor/memory"
+col=1
+row=0
+w=1
+h=1
+
+[tile_2]
+
+id="system_monitor/testing"
+col=2
+row=1
+w=1
+h=2