Fix Windows build error.

cmake/BuildHamlib.cmake

@@ -1,6 +1,6 @@
+set(HAMLIB_PATCH_CMD "")
 if(MINGW AND CMAKE_CROSSCOMPILING)
     set(CONFIGURE_COMMAND ./configure --host=${HOST} --target=${HOST} --without-cxx-binding --enable-shared --prefix=${CMAKE_BINARY_DIR}/external/dist --without-libusb CFLAGS=-g\ -O2\ -fstack-protector CXXFLAGS=-g\ -O2\ -fstack-protector)
-    set(HAMLIB_PATCH_CMD patch -p1 < ${CMAKE_SOURCE_DIR}/cmake/hamlib-windows.patch)
 else(MINGW AND CMAKE_CROSSCOMPILING)
     set(HAMLIB_PATCH_CMD "")
 if(APPLE)

cmake/hamlib-windows.patch

@@ -1,22 +0,0 @@
---- hamlib-4.5.5/rigs/dummy/flrig.c	2023-04-05 05:31:23.000000000 -0700
-+++ build_hamlib/rigs/dummy/flrig.c	2023-05-18 18:59:19.584095384 -0700
-@@ -76,7 +76,7 @@
- static int flrig_set_vfo(RIG *rig, vfo_t vfo);
- static int flrig_set_ptt(RIG *rig, vfo_t vfo, ptt_t ptt);
- static int flrig_get_ptt(RIG *rig, vfo_t vfo, ptt_t *ptt);
--static int flrig_set_func(RIG *rig, vfo_t vfo, setting_t setting, int status);
-+HAMLIB_EXPORT(int) flrig_set_func(RIG *rig, vfo_t vfo, setting_t setting, int status);
- static int flrig_set_split_freq(RIG *rig, vfo_t vfo, freq_t tx_freq);
- static int flrig_get_split_freq(RIG *rig, vfo_t vfo, freq_t *tx_freq);
- static int flrig_set_split_vfo(RIG *rig, vfo_t vfo, split_t split,
---- hamlib-4.5.5/configure.ac	2023-04-05 05:31:23.000000000 -0700
-+++ build_hamlib/configure.ac	2023-05-18 19:11:32.454634661 -0700
-@@ -281,7 +281,7 @@
- 	AC_SUBST([OSXLDFLAGS])],
- 
-     [mingw* | pw32* | cygwin*], [
--	WINLDFLAGS="-Wl,--output-def,libhamlib.def -Wl,--add-stdcall-alias"
-+	WINLDFLAGS="-Wl,--output-def,libhamlib.def"
- 	AC_SUBST([WINLDFLAGS])
- 
- 	# Enable ld's "auto import" for executables