factory-setup: Remove C implementation of RTT

Makefile

@@ -79,6 +79,8 @@ bootloader-btc-production: | build
 	$(MAKE) -C build bootloader-btc-production.elf
 factory-setup: | build
 	$(MAKE) -C build factory-setup.elf
+factory-setup-debug: | build-debug
+	$(MAKE) -C build-debug factory-setup.elf
 docs: | build
 	$(MAKE) -C build doc
 rust-docs: | build
@@ -139,6 +141,8 @@ rtt-client:
 	telnet localhost 19021
 run-debug:
 	arm-none-eabi-gdb -x scripts/jlink.gdb build-debug/bin/firmware.elf
+run-factory-setup-debug:
+	arm-none-eabi-gdb -x scripts/jlink.gdb build-debug/bin/factory-setup.elf
 dockerinit:
 	./scripts/container.sh build --pull --force-rm --no-cache -t shiftcrypto/firmware_v2:$(shell cat .containerversion) .
 dockerpull:

external/CMakeLists.txt

@@ -255,17 +255,6 @@ add_library(ctaes
 )
 target_include_directories(ctaes SYSTEM PUBLIC ctaes)
 
-add_library(rtt
-  SEGGER_RTT_V796b/RTT/SEGGER_RTT.c
-)
-target_compile_options(rtt PRIVATE "-Wno-cast-qual")
-# Define RTT config vars. The default DOWN buffer size (buffer for reading from host) is 64, which
-# is too small for our need.  The default UP buffer size (buffer for writing to host) is 1024, but
-# we define it anyway here in case the default changes.
-target_compile_definitions(rtt PUBLIC "BUFFER_SIZE_DOWN=(1024)" "BUFFER_SIZE_UP=(1024)")
-target_include_directories(rtt SYSTEM PUBLIC SEGGER_RTT_V796b/RTT SEGGER_RTT_V796b/Config)
-
-
 # optiga-trust-m
 # The below build instructions are loosely based on optiga-trust-m/tests/linux_i2c.cmake
 aux_source_directory(optiga-trust-m/src/cmd SRC_CMD_FILES)