package/libsoxr: cleanup configure options

BUILD_SHARED_LIBS is already driven by the cmake-package
infrastructure.

[Thomas: amend to really remove the BUILD_SHARED_LIBS option from the
package, after checking on IRC with Samuel.]

Signed-off-by: Samuel Martin <s.martin49@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libsoxr/libsoxr.mk

@@ -12,10 +12,6 @@ LIBSOXR_LICENSE_FILES = LICENCE COPYING.LGPL
 LIBSOXR_INSTALL_STAGING = YES
 LIBSOXR_CONF_OPTS = -DWITH_OPENMP=OFF
 
-ifeq ($(BR2_PREFER_STATIC_LIB),y)
-LIBSOXR_CONF_OPTS += -DBUILD_SHARED_LIBS:BOOL=OFF
-endif
-
 ifeq ($(call qstrip,$(BR2_ENDIAN)),BIG)
 LIBSOXR_CONF_OPTS += -DHAVE_WORDS_BIGENDIAN=1
 else