LGTM: Remove some additional legacy files [skip ci]

lgtm.yml

@@ -12,12 +12,16 @@ path_classifiers:
   - "src/CXX/"
   template:
   - "src/Tools/examplePy2wiki.py"
+  - "src/Mode/TemplatePyMod/"
   unmaintained:
   - "src/Mod/Robot/"
   - "src/Mod/Ship/"
   legacy:
   - "src/Mod/Assembly/"
   - "src/Mod/Drawing/"
+  - "src/Mod/Raytracing/"
+  - "src/Mod/Spreadsheet/App/Spreadsheet_legacy.py"
+  - "src/Mod/OpenSCAD/prototype.py"
 
 extraction:
   javascript: