Fix typo

Author: gkalab

scidOnTheGo/src/main/java/org/scid/android/engine/EngineManager.java

@@ -302,7 +302,7 @@ public EngineConfig removeEngine(String engineName) {
 					context.getString(R.string.engine_removed, engineName),
 					Toast.LENGTH_SHORT).show();
 
-			// If executable is no longer used, deleted it from
+			// If executable is no longer used, delete it from
 			// internal storage
 			if (!stillUsed) {
 				AlertDialog.Builder builder = new AlertDialog.Builder(context);