Don't link gcrypt for static GnuTLS

GnuTLS seems to have dropped grypt support ages ago, so let's not
confuse things by assuming it might be needed when linking GnuTLS
statically.

cmake/StaticBuild.cmake

@@ -56,8 +56,6 @@ if(BUILD_STATIC)
 
   if(GNUTLS_FOUND)
     # GnuTLS has historically had different crypto backends
-    FIND_LIBRARY(GCRYPT_LIBRARY NAMES gcrypt libgcrypt
-      HINTS ${PC_GNUTLS_LIBDIR} ${PC_GNUTLS_LIBRARY_DIRS})
     FIND_LIBRARY(NETTLE_LIBRARY NAMES nettle libnettle
       HINTS ${PC_GNUTLS_LIBDIR} ${PC_GNUTLS_LIBRARY_DIRS})
     FIND_LIBRARY(TASN1_LIBRARY NAMES tasn1 libtasn1
@@ -73,9 +71,6 @@ if(BUILD_STATIC)
     if(NETTLE_LIBRARY)
       set(GNUTLS_LIBRARIES "${GNUTLS_LIBRARIES} -lhogweed -lnettle -lgmp")
     endif()
-    if(GCRYPT_LIBRARY)
-      set(GNUTLS_LIBRARIES "${GNUTLS_LIBRARIES} -lgcrypt -lgpg-error")
-    endif()
     if(IDN2_LIBRARY)
       set(GNUTLS_LIBRARIES "${GNUTLS_LIBRARIES} -lidn2")
     endif()