doc: Drop outdated note

It is outdated since bitcoin/bitcoin#23060.

Author: hebasto

depends/README.md

@@ -79,9 +79,6 @@ For linux RISC-V 64-bit cross compilation (there are no packages for 32-bit):
 
     sudo apt-get install g++-riscv64-linux-gnu binutils-riscv64-linux-gnu
 
-RISC-V known issue: gcc-7.3.0 and gcc-7.3.1 result in a broken `test_bitcoin` executable (see https://github.com/bitcoin/bitcoin/pull/13543),
-this is apparently fixed in gcc-8.1.0.
-
 For linux S390X cross compilation:
 
     sudo apt-get install g++-s390x-linux-gnu binutils-s390x-linux-gnu