ci: remove patches for gcc-14, since the runners now have gcc 14.2 installed

Author: Totto16

.github/patches/gcc_14_2.diff

@@ -131,11 +131,6 @@ jobs:
           echo "CC=clang-19" >> "$GITHUB_ENV"
           echo "CXX=clang++-19" >> "$GITHUB_ENV"
           echo "OBJC=clang-19" >> "$GITHUB_ENV"
-          # Patch the libstd++ library, see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115119
-          # This is a dirty workaround, but it is needed, since gcc 14.2 (where this was patched usptream) is not easily available
-          # If we use the oracular (Ubuntu 24.10) repos, we could install gcc 14.2, but clang-19 isn't compatible with that
-          # TODO: remove this, after it works again
-          sudo patch -p1 /usr/include/c++/14/bits/unicode.h .github/patches/gcc_14_2.diff
 
       - name: Setup GCC (Linux)
         if: matrix.config.os == 'ubuntu' && matrix.config.use-clang == false