yubico-pam: remove package

Upstream stopped yubico-pam developments.
https://github.com/Yubico/yubico-pam
No packages depends on this.

Signed-off-by: Yanase Yuki <dev@zpc.st>

libs/yubico-pam/Makefile

@@ -1,44 +0,0 @@
-include $(TOPDIR)/rules.mk
-
-PKG_NAME:=yubico-pam
-PKG_VERSION:=2.27
-PKG_RELEASE:=1
-
-PKG_SOURCE:=pam_yubico-$(PKG_VERSION).tar.gz
-PKG_SOURCE_URL:=https://developers.yubico.com/yubico-pam/Releases
-PKG_HASH:=63d02788852644d871746e1a7a1d16c272c583c226f62576f5ad232a6a44e18c
-PKG_BUILD_DIR:=$(BUILD_DIR)/pam_yubico-$(PKG_VERSION)
-
-PKG_MAINTAINER:=Stuart B. Wilkins <stuwilkins@mac.com>
-PKG_LICENSE_FILES:=COPYING
-PKG_LICENSE:=BSD-2-Clause
-
-PKG_INSTALL:=1
-PKG_BUILD_PARALLEL:=1
-
-include $(INCLUDE_DIR)/package.mk
-
-define Package/yubico-pam
-	SECTION:=libs
-	CATEGORY:=Libraries
-	TITLE:=The Yubico PAM module
-	URL:=https://developers.yubico.com/yubico-pam/
-	DEPENDS:=+ykclient +ykpers +libyubikey +libpam +curl
-endef
-
-define Package/yubico-pam/description
-	The Yubico PAM module provides an easy way to integrate the YubiKey
-	into your existing user authentication infrastructure.
-endef
-
-CONFIGURE_ARGS += \
-	--enable-shared \
-	--disable-static \
-	--without-ldap
-
-define Package/yubico-pam/install
-	$(INSTALL_DIR) $(1)/usr/lib/security
-	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/security/pam_yubico.so $(1)/usr/lib/security
-endef
-
-$(eval $(call BuildPackage,yubico-pam))