buildroot/rebuild.sh: Remove unnecessary '-r' flag for tarball removal

Signed-off-by: Nathan Chancellor <[email protected]>

Author: nathanchance

buildroot/rebuild.sh

@@ -4,15 +4,15 @@
 function download_br() {
     mkdir -p src
     TARBALL=buildroot-${BUILDROOT_VERSION}.tar.gz
-    rm -rf "${TARBALL}"
+    rm -f "${TARBALL}"
     curl -LO https://buildroot.org/downloads/"${TARBALL}"
     SHA256=31a0dd7f5df75d20f6b74f0684918b643e5bf08d87dd5f9f02525852eecccf95
     if [[ $(sha256sum "${TARBALL}" | cut -d ' ' -f 1) != ${SHA256} ]]; then
         echo "Downloaded tarball's hash does not match known good one! Please try redownloading."
         exit 1
     fi
     tar -xzf "${TARBALL}" -C src --strip-components=1
-    rm -rf "${TARBALL}"
+    rm -f "${TARBALL}"
 }
 
 # Make sure we don't have any unset variables