package/gcc: drop stale hash

The hash for the GCC 10.4.0 tarball should have been removed a long
time ago, when support for GCC 10.x has been removed.

Fixes: d37a8f3a2e2a387b102f2982d51aca78bcc09727 ("package/gcc: remove gcc 10.x")
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/gcc/gcc.hash

@@ -1,7 +1,5 @@
 # From https://gcc.gnu.org/pub/gcc/releases/gcc-8.4.0/sha512.sum
 sha512  6de904f552a02de33b11ef52312bb664396efd7e1ce3bbe37bfad5ef617f133095b3767b4804bc7fe78df335cb53bc83f1ac055baed40979ce4c2c3e46b70280  gcc-8.4.0.tar.xz
-# From https://gcc.gnu.org/pub/gcc/releases/gcc-10.4.0/sha512.sum
-sha512  440c08ca746da450d9a1b35e8fd2305cb27e7e6987cd9d0f7d375f3b1fc9e4b0bd7acb3cd7bf795e72fcbead59cdef5b6c152862f5d35cd9fbfe6902101ce648  gcc-10.4.0.tar.xz
 # From https://gcc.gnu.org/pub/gcc/releases/gcc-13.3.0/sha512.sum
 sha512  ed5f2f4c6ed2c796fcf2c93707159e9dbd3ddb1ba063d549804dd68cdabbb6d550985ae1c8465ae9a336cfe29274a6eb0f42e21924360574ebd8e5d5c7c9a801  gcc-13.3.0.tar.xz
 # From https://gcc.gnu.org/pub/gcc/releases/gcc-14.2.0/sha512.sum