Remove leftover Signal Hound and Rohde & Schwarz shim modules

- signal_hound/USB_SA124B.py
- rohde_schwarz/RTE1000.py

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: jenshnielsen

pyproject.toml

@@ -275,8 +275,6 @@ known-first-party = ["qcodes"]
 # deprecated modules left
 # for backwards compatibility
 "src/qcodes/instrument_drivers/AimTTi/AimTTi_PL601P_channels.py" = ["F401"]
-"src/qcodes/instrument_drivers/signal_hound/USB_SA124B.py" = ["F401"]
-"src/qcodes/instrument_drivers/rohde_schwarz/RTE1000.py" = ["F401"]
 "src/qcodes/instrument_drivers/devices.py" = ["F401"]
 
 # TID253 these imports are fine at module level