build: remove gmp

Core and secp have not used gmp for a very long time now (core disabled
it in 2015).

Signed-off-by: Jon Griffiths <jon_p_griffiths@yahoo.com>

.github/scripts/build.sh

@@ -79,16 +79,6 @@ then
     rm sqlite-src-3260000.zip
     rm -rf sqlite-src-3260000
 
-    wget -q https://gmplib.org/download/gmp/gmp-6.1.2.tar.xz
-    tar xf gmp-6.1.2.tar.xz
-    cd gmp-6.1.2 || exit 1
-    ./configure --disable-assembly --prefix="$QEMU_LD_PREFIX" --host="$TARGET_HOST"
-    make
-    sudo make install
-    cd ..
-    rm gmp-6.1.2.tar.xz
-    rm -rf gmp-6.1.2
-
     ./configure CC="$TARGET_HOST-gcc" --enable-static
 
     make -s -j32 CC="$TARGET_HOST-gcc"

.github/scripts/setup.sh

@@ -24,7 +24,6 @@ sudo apt-get -qq install --no-install-recommends --allow-unauthenticated -yy \
      git \
      libc6-dev-arm64-cross \
      libc6-dev-armhf-cross \
-     libgmp-dev \
      libpq-dev \
      libprotobuf-c-dev \
      libsqlite3-dev \
@@ -82,4 +81,4 @@ sudo chmod a+x /usr/local/bin/protoc
 export PROTOC=/usr/local/bin/protoc
 export PATH=$PATH:/usr/local/bin
 env
-ls -lha /usr/local/bin
+ls -lha /usr/local/bin