Allow marker removal using the DELETE key

src/main/java/com/replaymod/replay/ReplayModReplay.java

@@ -6,6 +6,7 @@ import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
 import com.replaymod.core.ReplayMod;
 import com.replaymod.replay.camera.*;
+import com.replaymod.replay.gui.overlay.GuiMarkerTimeline;
 import com.replaymod.replay.handler.GuiHandler;
 import com.replaymod.replaystudio.data.Marker;
 import com.replaymod.replaystudio.replay.ReplayFile;
@@ -72,6 +73,17 @@ public class ReplayModReplay {
             }
         });
 
+        core.getKeyBindingRegistry().registerRaw(Keyboard.KEY_DELETE, () -> {
+            if (replayHandler != null) {
+                GuiMarkerTimeline timeline = replayHandler.getOverlay().timeline;
+                if (timeline.getSelectedMarker() != null) {
+                    replayHandler.getMarkers().remove(timeline.getSelectedMarker());
+                    replayHandler.saveMarkers();
+                    timeline.setSelectedMarker(null);
+                }
+            }
+        });
+
         core.getKeyBindingRegistry().registerKeyBinding("replaymod.input.thumbnail", Keyboard.KEY_N, new Runnable() {
             @Override
             public void run() {

src/main/java/com/replaymod/replay/gui/overlay/GuiMarkerTimeline.java

@@ -176,4 +176,12 @@ public class GuiMarkerTimeline extends AbstractGuiTimeline<GuiMarkerTimeline> im
         }
         return super.getTooltipText(renderInfo);
     }
+
+    public void setSelectedMarker(Marker selectedMarker) {
+        this.selectedMarker = selectedMarker;
+    }
+
+    public Marker getSelectedMarker() {
+        return selectedMarker;
+    }
 }