build: remove remaining bits of Unicorn

Unicorn has been removed in fc6db97a09e2de5eff10131ddcab9cf8fb2f736c

externals/CMakeLists.txt

@@ -44,10 +44,6 @@ target_include_directories(mbedtls PUBLIC ./mbedtls/include)
 add_library(microprofile INTERFACE)
 target_include_directories(microprofile INTERFACE ./microprofile)
 
-# Unicorn
-add_library(unicorn-headers INTERFACE)
-target_include_directories(unicorn-headers INTERFACE ./unicorn/include)
-
 # libusb
 if (NOT LIBUSB_FOUND OR YUZU_USE_BUNDLED_LIBUSB)
     add_subdirectory(libusb)

externals/find-modules/FindUnicorn.cmake

@@ -1,18 +0,0 @@
-# Exports:
-#  LIBUNICORN_FOUND
-#  LIBUNICORN_INCLUDE_DIR
-#  LIBUNICORN_LIBRARY
-
-find_path(LIBUNICORN_INCLUDE_DIR
-          unicorn/unicorn.h
-          HINTS $ENV{UNICORNDIR}
-          PATH_SUFFIXES include)
-
-find_library(LIBUNICORN_LIBRARY
-             NAMES unicorn
-             HINTS $ENV{UNICORNDIR})
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(unicorn DEFAULT_MSG
-                                  LIBUNICORN_LIBRARY LIBUNICORN_INCLUDE_DIR)
-mark_as_advanced(LIBUNICORN_INCLUDE_DIR LIBUNICORN_LIBRARY)