remove wrong files

package/librt/files/libpthread.postinst

@@ -1,4 +0,0 @@
-#!/bin/sh
-if [ ! -z $IPKG_INSTROOT ];then 
-	(cd $IPKG_INSTROOT/lib && ln -sf libpthread.so.0 libpthread.so)
-fi

package/librt/files/libpthread.so.arm

@@ -1,5 +0,0 @@
-/* GNU ld script
-   Use the shared library, but some functions are only in
-   the static library, so try that secondarily.  */
-OUTPUT_FORMAT(elf32-arm)
-GROUP ( /lib/libpthread.so.0 /usr/lib/libpthread_nonshared.a )

package/librt/files/libpthread.so.x86

@@ -1,5 +0,0 @@
-/* GNU ld script
-   Use the shared library, but some functions are only in
-   the static library, so try that secondarily.  */
-OUTPUT_FORMAT(elf32-i386)
-GROUP ( /lib/libpthread.so.0 /usr/lib/libpthread_nonshared.a )

package/librt/files/libpthread.so.x86_64

@@ -1,5 +0,0 @@
-/* GNU ld script
-   Use the shared library, but some functions are only in
-   the static library, so try that secondarily.  */
-OUTPUT_FORMAT(elf64-x86-64)
-GROUP ( /lib/libpthread.so.0 /usr/lib/libpthread_nonshared.a )