[dynarmic] remove dead-code arm/thumb disassembler (#3546)

llvm already does this, no need to reinvent the wheel

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3546
Reviewed-by: DraVee <dravee@eden-emu.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

src/dynarmic/tests/CMakeLists.txt

@@ -1,4 +1,4 @@
-# SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+# SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 # SPDX-License-Identifier: GPL-3.0-or-later
 include(TargetArchitectureSpecificSources)
 
@@ -9,7 +9,6 @@ add_executable(dynarmic_tests
     fp/unpacked_tests.cpp
     rand_int.h
     # A32
-    A32/test_arm_disassembler.cpp
     A32/test_arm_instructions.cpp
     A32/test_coprocessor.cpp
     A32/test_svc.cpp