ci: drop dead wgetrc as there are no uses of wget in our CI images

Note that if you grep, you'll find two instances of `wget`, but those are not
executed in our docker images, but on the generic FDo gitlab runners, so the
/etc/wgetrc file in our docker images cannot affect them.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34684>

.gitlab-ci/container/container_pre_build.sh

@@ -38,14 +38,6 @@ chmod +x /usr/local/bin/ninja
 # flags (doesn't apply to non-container builds, but we don't run make there)
 export MAKEFLAGS="-j${FDO_CI_CONCURRENT:-4}"
 
-# make wget to try more than once, when download fails or timeout
-echo -e "retry_connrefused = on\n" \
-        "read_timeout = 300\n" \
-        "tries = 4\n" \
-	"retry_on_host_error = on\n" \
-	"retry_on_http_error = 429,500,502,503,504\n" \
-        "wait_retry = 32" >> /etc/wgetrc
-
 # Ensure that rust tools are in PATH if they exist
 CARGO_ENV_FILE="$HOME/.cargo/env"
 if [ -f "$CARGO_ENV_FILE" ]; then

.gitlab-ci/container/lava_build.sh

@@ -402,7 +402,6 @@ rm $ROOTFS/{llvm-snapshot,winehq}.gpg.key
 rm "$ROOTFS/setup-test-env.sh"
 rm "$ROOTFS/setup-rootfs.sh"
 rm "$ROOTFS/strip-rootfs.sh"
-cp /etc/wgetrc $ROOTFS/etc/.
 
 # Copy all tags to the rootfs, so test jobs can check if they are using the intended version
 TAG_FILE_DIR="$(get_tag_file)"