package/pkg-cmake.mk: remove the USE_CCACHE CMake flag for host-package

The USE_CCACHE CMake flag is only useful when building target package
(only the toolchainfile.cmake uses it).

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/pkg-cmake.mk

@@ -86,7 +86,6 @@ define $(2)_CONFIGURE_CMDS
 		-DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY="BOTH" \
 		-DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE="BOTH" \
 		-DCMAKE_INSTALL_PREFIX="$$(HOST_DIR)/usr" \
-		-DUSE_CCACHE=$$(if $$(BR2_CCACHE),ON,OFF) \
 		-DBUILD_TESTING=OFF \
 		$$($$(PKG)_CONF_OPT) \
 	)